The optimalservicelife of a mine is discussed theoretically from economic point of view by analysing the cost and benefit.
本文采用成本与效益分析的方法,从经济上对矿井合理服务年限的定量问题,作了理论上的探讨。
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As long as the data of failure time, failure time interval and maintaining cost are collected in operation of equipment, the optimalservicelife of equipment can be determined.
High plasticizing performance with barrier screw. Melting performance and homogeneity optimized by additional compounding section. Long servicelife thanks to optimal choice of materials.