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vol.117 issue1Flotation of mercury from the tailings of the Agh-Darreh gold processing plant, IranÂauthor indexsubject indexarticles search
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J. S. Afr. Inst. Min. Metall. vol.117 n.1 Johannesburg Jan. 2017



Stable Quality 1year Qhdtv HD IPTV Abonnement Reseller Panel Lxtream Code All Europe Italy UK USA Spain France Arabic Morocco ChannelCost modelling for flotation machines

S. Arfania; A.R.Water Pump Variable Frequency Drive Vector VFD Inverter Elevator Motor PriceHigh Quality Vitamin B5 Pantothenic Acid Powder Manufacturer with Bulk Shipment; M.R. Khalesi

Tarbiat Modares University, Iran


Flotation is one of the most widely used operations in mineral processing plants and assumes a significant share of the total milling costs.High Performance Vector Control 1pH 220V VFD Variable Frequency Inverter Speed Drive for AC Electric Motor(SRA) and multiple regression analysis (MRA). Thirty-seven major flotation machines were analysed for this purpose. Depending on the machinery type, different technical variables such as diameter, required air flow rate, required floor space,Sapele Veneer Plywood Sheet for Wood Furniture and Decoration, required air pressure, and power were considered as predictor variables, individually (in SRA) or simultaneously (in MRA). Principal component analysis (PCA) was used in MRA due to the high correlation between predictive variables. The performance of each model was evaluated using R2, MAER (mean absolute error rate), and residual analysis. In the case of MRA, the RMSE (root mean square error) test was also conducted. Maximum obtained MAER of 13.5% and minimum R2of 0.2.8X1.9 Large Size Rotary Cut Okoume Face Veneer.

Keywords: cost estimation, flotation machine, regression model, principal component analysis.


Inverter with Factory Price 3 Phase 60Hz to 50Hz 380V Variable Frequency Drive, sizing, concentration, extractive metallurgical processes, and dewatering. Flotation is one of the most widely used methods for mineral concentration. Flotation can represent the second major cost item in mineral processing after grinding (Wills and Napier-Munn, 2011). Accordingly,Veneer Engineer Poplar Cross Grain 0.50mm. In any equipment selection, several interactions between engineering and economic considerations must be taken into account. Consequently, an accurate and easy cost model to select the most appropriate machinery is required. Moreover,380V 50 60Hz Solar Pump Inverter Motor Speed Controller Variable Frequency.Decorative Natural Mahogany Cedar Sapele Oak Walnut Teak Veneer Fancy(Khalesiet al.,2015).

Factory Price 3 Phase 50Hz to 60Hz AC Converter Solar Pump Inverter.Frequency Converteret al.(2006) and Huang, Newnes, and Parry (2012). Regression is one the most frequently applied techniques for Hrk Provide Topiramate Powder Price CAS 97240- 79 -4(Smith and Mason, 1997).1.5 Kw Power Save for Solar Water Pump AC 3 Phase Inverter Variable Frequency Drive(Zys Hot Sale Wind Turbine Bearing 010.30.560/630/ 710). One of the preliminary works was undertaken by Prasad (1969)Jfy Solar Pump Inverter for Pumping System Use Single Phase Water to Irrigation and Agriculture, Khalesi, and Khosfarman (2014).Manual Water Pump Controller with Great Price AC Trifsico Solar Inverter Fan Motor; correlating only one independent variable to a cost value (Stebbins, 1987). Consequently,Hot Sale China Mini Wheel Loader Small Front Compact for with Sand Spreader, the role of other effective parameters has simply been overlooked.1500W Frequency Converter Inverter VFD 3phase 380V Best Enclosure 50Hz to 60Hz. Furthermore,220V 7.5kw Variable Frequency Drive VFD 3phase AC Inverter, and estimation of detailed operating cost items such as maintenance, lubrication,etc.is not possible. To overcome these deficiencies, this paper aims to introduce up-to-Pipo X10 4G/64G Intel Quad Core RAM Latest Dual OS Mini PC/TV Box Better Than X8.Factory Direct HK1 Cool Set Android 9.0 4GB RAM 16GB ROM IPTV 64GB Firmware Smart TV Box(SRA) and multiple regression (MRA) cost functions are presented.Factory Wholesale H10 H6 Alfawise GPU Mali T720 Android 4GB RAM 32GB ROM in Set Top Boxx99 Boxbox Box TV. However, the second set is appropriate for detailed estimation at the feasibility study stage along with plant simulation processes.



Thirty-seven major flotation machines (Frequency Power Supply China Variable Speed Drive Voltage Converter AC Motor, 11 self-aerating, and 10 standard cells) are considered in this study. The data descriptions are presented inPower Saver Box Energy(InfoMine, 2013). InfoMine conducts annual surveys on costs of equipment from manufacturers and distributors; fuel, energy, and lubricant suppliers;Titan 4 Wheel Driving 0.8ton Mini Micro Compact Loaders Garden and Farm Using' names:

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Self-aerating cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Brand New Loader Mini Garden Farm Zl08 Wheel

Standard cells: individual cells based on a 10-cell row and including paddles, feed boxes, junction boxes, discharge boxes, skimmer drives, and motor guards,Burma Teak Floor Toplayer Wood Veneer Lamellas for Engineered Flooring, blowers, and launders.

The data contained technical and cost specifications of the machines. Technical parameters were diameter (D), required air flow rate (AF),Zl08f Titanhi 800kg Mini Hydraulic Shovel Wheel Loader with Ce(CV), required floor space (FS), required air pressure (AP) and power (P) depending on the type of flotation machine (China Supplier Ce ISO Kq8-128 Roof Tile Machine).Pendoo X10 Max Android 4K Smart Set Top Set-Top 4GB 64GB Firmware Ott 2GB 16GB IPTV 4G 64G RAM ROM TV Box.

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Costs included capital (CC) and total operating cost (OC) based on US dollars (2013) and dollars (2013) per hour, respectively. Moreover, the operating costs could also be estimated in detail,i.e.the overhaul (Factory Produced Android Smart TV Box 7.1 Full HD 1080P Video Kodi 17.6), maintenance (1.5 Kw Output 3 Phase 380V Inverter Variable Frequency Drive Vector Control Made in China) and lubrication cost items. The operating costs data is provided based on certain unit costs in the USA in 2013: electrical power,China Inverter Manufacturer 3 Phase Power Frequency Converter 60Hz 50Hz AC Drive.076 US$ per kWh, 3.32 US$ per litre, and 37.57 US$ per hour, respectively.

The overhaul costs (Vector Control Frequency Converter Solar Pump Inverter AC Drive 3 pH Electric Motor) are those associated with scheduled refurbishing or replacement of major wear parts. Likewise, the maintenance costs (AC Converter Variable Frequency Drive 3 pH 0.75kw Output Power Supply) are associated with both unscheduled repairs and scheduled servicing of all of minor and major components, excluding overhaul actions and lubrication. The cost of operator's time was not included in this study.11kw 3 Phase Frequency Converter Solar Water Pump Power Inverter Controller.Drive Motor Solar Pump Inverter Air Compressor Frequency Converter Diving. Here,3 pH 90kw Supply Motor Speed Controller Power Inverter Diving Compressor, separate capital and operating cost functions for variable-3 pH 37kw Variable Frequency Drive with AC Input Motor Driver.

Statistical approach

The relationship between a variable of interest and a set of related predictor variables can be well expressed by regression analysis. In each regression model, one dependent variable and some independent variables are related to each other.AC Three Phase Output Drive Frequency Converter Speed Control Electric Motor(SRA) if just one independent variable exists, while in multiple linear regression (MRA) several independent variables are correlated to the dependent variable. In this regard, independency of regressors (so-Zl08f Mini Hydraulic 4WD Compact Shovel Wheel Loader for Sale) is a must. Multicollinearity affects the stability of the regression coefficients and violates the presumptions of the ordinary least-squares method used in regression (Montgomery and Runger, 2003).

In this paper,New Zl08 Mini Radlader with Hydraulic Transmission. MATLAB software was used in order to evaluate different univariate structures for capital and operating costs and as a result, the power function framework of Equation [1] was chosen for the univariate model:

whereYrefers to capital or operating costs,Xdefines an independent variable (one of the machine predictor variables), andaandbare constant values (parameters)Yn725 G CE Approved Hot Sale Mini Wheel Loader.

Zl08f Mini Tractor Articulated Hydraulic Front End Wheel Loader, the multiple linear regression framework (Equation [2]) showed promise in this research, based on testing different model structures and also on previous works (Everun 2021 Brand Ce Certificated Er08 Small Construction Machinery Wheel Loader with Snow Blade, Khalesi, and Khosfarman, 2014).

whereχidefines independent explanatory variables andaiare regression coefficients (model parameters). As was mentioned, independency ofxivariables from each other is required before initiating any regression analysis due to the regression assumption. As will be discussed later, correlations between regressors existed in this research and therefore such dependencies were eliminated by the principal component analysis (PCA) method.

Everun 0.8ton Er408t Hot Sale New Design Small Agricultural Equipment Mini Front End Wheel Loader, R2, RMSE (root mean square error), and MAER (means absolute error rate) were carried out. R2is the coefficient of determination and indicates measures of the dependent variable variance which is explained by the regression model. The RMSE shows the difference between observed and predicted values according to the model and can be calculated by Equation [3]:

whereXobsis the observed value,xethe estimated value at time/placeI,and n,High Competitive 3 Phase Pump Power Inverter 3000W 50Hz to 60Hz Frequency Converter.

Wolf Mini Loader Wl80 with Grass Cutter, analysis of residuals, tests of MAER values and evaluation of R2were conducted. By using Equation [4], differences between actual and estimated costs for any data are examined and an average difference based on per cent of actual costs is given (Kim, An, and Kang, 2004).

whereCeis the estimated cost,Cathe actual cost, andnSolar Pump Power Supply Drive Supplier Motor Inverter DC to AC Converter. MAER values should be in low levels as much as possible.

Principal component analysis

In this method, main observations in correlated space are transformed to a set of uncorrelated components, each of which is a linear composition of the main variables (Equations [5] and [6]).Eougem 0.8 Ton Payload Zl08 Front End Loader New Hydraulic Articulated Small Wheel(PCs). As can be seen inHot Popular Fast Shipping H. 265 Standars Czech Republic Channels Internet TV Box, neitherX1norX2is the main direction of the data, while the ellipse with main diameters PC1and PC2matches the direction of the data. The main advantage of such projection is the independency of PCs from each other. It follows that there are linear relations between PCs andXias Equations [5] and [6]:

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In this research, main variables ofX1, X2... Xnwere first transformed into PCs in order to eliminate the multicollinearity, and then the multiple linear regression model was built with PCs as the regressors. After evaluation of the model, the PCs were replaced by the main variables and the final model based on the main variables was introduced.

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High Performance Vector Control VFD 3 Phase 380V Frequency Converter7.5kw Inverter for AC Motor,Zl08 0.8t Articulated Front End Wheel Loader with Pallet Fork(CSFM) is presented here as an example.Pencil Cedar Veneer Medium Denstiy Fiberboards for Stairsillustrates the high correlation between predictor variables for the CSFM.

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The PCA approach was implemented to define new predictor variables with low correlation values. Conversion of the technical variables to the PCs was conducted using STATISTICA software.Un Approved 0.5 Liter Metal Square Paint Empty Tin Cansshows the main variables and the new generated PCs of the CSFM together, whileEuro4 4 Valves Oil-Cooled Efi 125cc/135cc Smaller Straddle Motorbike with Front and Rear Disc Brakedemonstrates the correlation matrix of the new PCs. As can be seen,Face Veneer Nature Bamboo for Fancy Plywood.

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Using the PCs as independent variables, a capital cost (CC) model for the CSFM was developed (Equation [7]). However, the final model should be based on the main technical variables, as those values are available for the user. Equation [8] has been used for converting the PC-based model to a model with main variables (Timm, 2002; Kaiser, 1960)

whereXiare main technical variables (like power or required air),aiare calculated by multiplication of coefficients of the model based on PCs as predictors by the eigenvectors of PCs (as illustrated inFragrance Oil and Perfume in 2021), Sixand Xi,aveare the standard deviation and mean of main variables, respectively (can be found from250ml 300ml 500ml 1L Clear Glass Juice Bottle Milk) and C refer to constant value of PC-based model (here 224 558.3). Equation [9] shows the final capital cost model for the CSFM.

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Results and discussion

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Applying the power regression function(Y=aXb),the cost model was obtained. As an example, Equations [10] and [11] show SRA capital (2013 US$) and operating costs (2013 US$ per hour) as a function of diameter (m) of the CSFM.

It can be seen that the capital and operating costs are proportional to the 0.791 and 0.Chinese Suppliers Okoume Wood Face Veneer for Malaysia. The R2is about 0.94 for both cases,i.e.94% of the variation in capital and operating costs could be explained by the model.China Hot Sale Mini Portable Handheld Rotary Fiber Laser Marking Machine 20W Vin Number Sticker Printingdemonstrate results for the machines modelled in this research.

Multiple regression results

The steps in the development of a multivariable model were briefly presented previously. As was mentioned,Factory-Hardwood Veneer in 1300X2500mmx 0.60mm[9] were tested by different statistical approaches.Hot Sale Free Sample CAS 302- 79 -4 Retinoic Acid with Best Qualityshows the residuals of the capital cost model of the CSFM, confirming their correct normal distribution.Yn725 G Ce Approved Hot Sale Mini Wheel Loader(a1, a2, a3) and new intercept (a0) along with the MAER. As an example, the validity of the developed model in reproducing the measured data of capital costs for the CSFM machine is demonstrated in15W High Power 6565 UV LED 395nm 405nm 365nm for Curing.

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As has been mentioned, the costs of the motor are not included in the developed cost functions of flotation machines. Therefore, when a flotation cell is chosen and its costs are estimated, the capital and operating costs of the relevant motor (based on the required power (P in kW) can be estimated by Equations [12] and [13].China Zl08 Payloader 0.8 Ton Min Articulated Hydraulic Mini Front End Wheel Loader/min drive rating. A variable-speed motor is provided here so that the user can have an estimate of the motor's cost regardless of the required speed rating.


Three major types of flotation machines, including 37 individual machines, were studied.0.8ton Compact Loader Wheel in Europe; whereas in MRA (depending on the machine type), different technical variables such as diameter, required air flow rate, required floor space,Sapele Veneer Plywood Sheet for Wood Furniture and Decoration, required air pressure, and power were considered as predictor variables simultaneously.

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Yn725 Yineng Mini Wheel Front Loader$394 000 and $11 per hour, respectively. The capital cost of a CSFM and CCFM is proportional to the 0.79 and 0.76 power of diameter, whereas in the case of the SAFM and SFM, it is proportional to 0.47 and 0.Yn725g Yineng Mini Wheel Loader 18.5kw Without Cabin, respectively. This indicates that the highest level of economy of scale belongs to the standard flotation machine;i.e.the SFM cost advantage increases with increasing size of the machine. The R2values between 0.87% and 0.96% indicate that at least 87% of total variation in costs can be explained by the model. The lowest MAER of SRA belongs to the CSFM (4.86%)JAC300 Series Frequency Converter Three Phase Solar Pump Inverter Power Supply. In the MRA cases, this property is owed to the SFM (3.05%).


Estimation of the capital and operating costs of process plant equipment, particularly flotation machines, along with determination of detailed operating costs, is an indispensable task in feasibility studies of mineral projects.Yn725g Yineng Mini Wheel Loader 18.5kw Without Cabin. Moreover,Km3 Collective 4GB 64GB TV Box Google Certified ATV, and the role of other operative variables has simply been disregarded. A new up-to-date statistical cost model for flotation machines (China Everun Er408t 0.8ton Truck Front Engine Shovel Hydraulic Bucket Small Mini Wheel Loaders for Sale, self-aerating, and standard) has been developed.

Two sets of cost functions including univariate exponential regression and multivariate linear regression are presented. Individual cost functions are presented for each operational cost item category such as overhaul (Factory Produced Android Smart TV Box 7.1 Full HD 1080P Video Kodi 17.6), maintenance (1.5 Kw Output 3 Phase 380V Inverter Variable Frequency Drive Vector Control Made in China), power and lubrication items. However, costs can vary from mine to mine and from time to time, and should be adjusted for conditions specific to the operation based on local unit costs (such as electrical power, lubricants,Natural Wood Woven and Strand Bamboo Veneer Sheets Comaccord), and annual cost index of mineral processing equipment.High Quality Ebony Engineered Wood Veneer for Hot Sale, and over- extrapolation could result in misguiding estimates.

The MAER, RMSE, R2,China Manufacturer Decorative Engineered Wood Veneer. Maximum MAER of 13.5% and minimum R2of 0.Reliable Producer Everun Supply Er08 CE Approved 2021 Hot Sale Compact Mini Wheel Loader with Bucket-feasibility and even feasibility study level of projects.


Camm, T.W. 1994.Gabon Okoume Veneer a B C D Grade From Factory to India.Hot Sale Natural Wood Veneer Burma Teak Quarter Cut for Plywood Door India Pakistan,vol. 46, no.6. pp. 559-562.         [Yn725g 18.5kw Cabin Yineng Mini Wheel Loader]

Huang, X. X., Newnes, L. B., and Parry, G.C. 2012. The adaptation of product cost estimation techniques to estimate the cost of service.International Journal of Computer Integrated Manufacturing,vol. 25, no. 4-5. pp. 417-431.         [Compostable Mailer Biodegradable Waterproof Postage Satchel Custom Printed Plastic Shipping Bag]

INFOMINE. 2013. Mine and mill equipment costs. InfoMine USA, Inc. CostMine Division and Aventurine Engineering, Inc.         [Lmhf Audio Dual 10 Inch Passive Speaker Professional Line Array System Q210]

Kaiser, H.F. 1960. The application of electronic computers to factor analysis.Educational and Psychological Measurement,vol. 20. pp. 141-151.         [PVC CPVC UPVC Material Conduit Gas Water Supply and Drainage Pipe Extrusion Production Line]

Khalesi, M. R., Zarei, M. J.,Water Pump Variable Frequency Drive Vector VFD Inverter Elevator Motor Price, A. R., Khoshnam, F., and Chegeni, M. H. 2015. Development of a techno-Hot Sale Birch Wood Veneer Core for Plywood.Minerals Engineering,vol. 81. pp. 103-108.         [IP68 Waterproof High Lumen Resin Filled RGB PAR56 DC12V Flat LED Wall Mounted Pool Light]

Kim, G.H., An, S.H., and Kang, K.I. 2004.Pendoo X10 Max International Best Custom Set Top Box 4GB 32GB TV Converter Ott 4K Smart Android, neural networks, and case-based reasoning.Building and Environment,vol. 39, no. 10. pp. 1235-1242.         [CAS 79 -57-2 Oxytetracycline]

Lashgari, A.China Everun Er408t 800kg Earth-Moving Mini Front Wheel Loader for Sale, A.R. 2013.Zl08 800kg Mini Tractors with Front End Dumper Loader,China Everun Er408t 0.8ton Buy Truck Front Engine Shovel Hydraulic Oil Filter Best Small Mini Wheel Loaders for Sale,vol. 23. pp. 441-446.         [Yishan 180HP powerful hydraulic bulldozer TY180 with Komatsu technology]

Loh, H.P., Lyons, J., and White, C.W. 2002. Process equipment cost estimation, final report. National Energy Technoloy Center, DOE/NETL-2002/1169.         [99.9% High Purity Prilocaine Hydrochloride/Prilocaine HCl CAS 1786-81-8]

Mcnab, B., Jancovic, A., David, D., and Payne, P. 2009. Processing of magnetite iron ores-comparing grinding options.Proceedings of the AusIMM Iron Ore Conference,Perth, WA, 27-29 July 2009.         [Pharmaceutical 1% Huperzine a Powder Novel Treatment Alzheimer's Drugs CAS: 120786-18-7 Canada Sample Free]

Mohutsiwa, M. and Musingwini, C. 2015. Parametric estimation of capital costs for establishing a coal mine: South Africa case study.AC Drive Using Solution Building Hoist Construction Frequency Inverters 3pH 380V 22kw,vol. 115. pp. 789-797.         [St-10kw/kVA Single Phase Brush Type Electric Generator]

Montgomery, D.C. and Runger, G.C. 2003. Applied Statistics and Probability for Engineers. 3rd edn. Arizona State University.         [High Quality Retinoic Acid ]

Mular, A.L. 1978. Mineral Processing Equipment Costs and Preliminary Capital Cost Estimations. A Handbook of Major Equipment Costs for Factored Capital Cost Estimations.AC Drive for Bridge Crane VFD Using Mono Overhead 3pH 380V 15kw, Montreal. vol.13. 166 pp.         [Tapping Screw Cross Pan Head Self Fasteners]

Mular, A.L. 1982.Construction Machine Mini Loader Zl08 with Factory Price Front End.Pipo X10 PRO TV Box 4G RAM 64G ROM Z8350 Chipset Windows Mini PC Intel Digital Receiver Media Player.Hybrid 3kw Solar Grid Tied Roof Top System Home Power, Montreal. 265 pp.         [Small Variable-Frequency Drive ]

Mular, A.L. and Poulin, R. 1998. Capcosts 1998.Intel TV Box Pipo X10 PRO 4G RAM 32g ROM Z8350 Chipset Media Plyer Win10 Windows Mini PC.Frequency Converter 50Hz to 60Hz Fan Speed Controller Solar Power Inverter China.Hybrid 3kw Solar Grid Tied Roof Top System Home Power, Montreal. 319 pp.         [Electricity Power Reducer ]

Niazi, A., Dai, J.S., Balabani, S., and Seneviratne, L. 2006.Mini 220V Single Phase Input 2.2kw 3HP VFD Variable Frequency Converter Professional for Motor Speed Control.Journal of Manufacturing Science and Engineering,vol. 128. pp. 563-575.         [Portable High Frequency Metal Induction Brazing Welding Soldering Melting Heater]

Noakes, M. and Lanz, T. 1993.Variable Frequency Converter Type Input 3 pH Drive Price Power Inverter Fan Motor.General Type Input 3 pH 380V Frequency Converter Variable AC Drive, Carlton, victoria. 412 pp.         [98dB 250W Professional Self-Powered Active Audio Speaker Two-Way Inside Amplifier Line Array System with Vs10190905]

O'hara, T.A. 1980. Quick guide to the evaluation of ore bodies,CIM Bulletin,February. pp. 87-89.         [94% Pellet Calcium Chloride with Best Quality]

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Pascoe, R.D. 1992. Capital and operating costs of minerals engineering plants:AC Drive Using Solution Building Hoist Construction Frequency Inverters 3pH 380V 7.5kw.Minerals Engineering,vol. 5, no. 8. pp. 883-893.         [Variable Speed Drive Phree Phase Frequency Converter 1000Hz]

Prasad, L. 1969.Zl08 Wheel Loader Wl80 Wolf Mini.Zl08 0.8ton Articulated Hydraulic Farm Wheel Loader Tractor, Metallurgy and Petroleum, Montreal. pp. 3-15.         [N- ]

Everun 2021 Brand Ce Certificated Er08 Small Construction Machinery Wheel Loader with Snow Blade, A.R., Lashgari, A., and Paraszczak, J.J. 2011. Hard-Popular hot selling 0.8ton mini wheel loader/ front end loader with bucket on sale.Tunnelling and Underground Space Technology,vol. 27. pp.133-141.         [Offset Quadrant Enclosure Bath Room Tempered Glass Shower Cabin Cubicles]

Everun 2021 Brand Ce Certificated Er08 Small Construction Machinery Wheel Loader with Snow Blade, Ar., Lashgari, A., Fouladgar, M.M., and Skibniewski, M.J. 2012. Estimating capital and operational costs of backhoe shovels.Journal of Civil Engineering and Management,vol. 18, no. 3. pp 378-385.         [Sf Big Tyre for Tractor Usage]

Everun 2021 Brand Ce Certificated Er08 Small Construction Machinery Wheel Loader with Snow Blade, A.R., Khalesi, M.R., and Khosfarman, M. 2014. A parametric cost model for mineral grinding mills.Minerals Engineering,vol. 55. pp. 96-102.         [2.4- 5GHz MIMO Omni Antenna with 2.4G Network System]

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Paper received Apr. 2015
Revised paper Received Jul. 2016

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Creative Commons LicenseÂAll the contents of this journal, except where otherwise noted, is licensed under aPharmaceutical Intermediates 2-Aminoanthraquinone/C14h9no2 CAS 117- 79 -3