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【Daily Question】Utilities - Water Supply and Drainage - 20190109

2019-01-09View Original

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The last edit to this post was made by hesonchang214 on 2019-1-10 at 09:42. The concept of (): within a certain period of time (the investment repayment period), the sum of the cost of the pipeline network and the operating costs (mainly electricity costs) is minimized at a certain flow rate. a、Economic flow rate b、Minimum allowable flow rate c、Average economic flow rate d、Minimum economic flow rate Answer: a

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