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3.1 Introduction. The unit cost of logging or road construction is essentially derived by dividing cost by production. In its simplest case, if you rented a tractor with operator for $60 per hour - including all fuel and other costs - and you excavated 100 cubic meters per hour, your unit cost for excavation would be $0.60 per cubic meter.
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FLSmidth ball mill for cement grinding. Versatile system based on standard modules 2 The FLSmidth ball mill is designed for grinding of clinker, gypsum and dry or moist additives to any type of cement. The mill may operate in either open or closed circuit and with or without a pre-grinder to achieve maximum overall grinding efficiency and high flexibility in terms of product quality. The mill ...
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DC Motor Resource: Motor Calculations, Formulas And Examples. When selecting a DC motor for an application, or when developing a powered prototype there are numerous calculations and formulas which must be considered to produce a well-functioning, sufficiently-powered, and safe device.