灌水率图的修正时,延长或缩短灌水时间与原定时间相差不应超过() A.15% B.20

题型:单项选择题

问题:

灌水率图的修正时,延长或缩短灌水时间与原定时间相差不应超过()

A.15%

B.20%

C.25%

D.30%

考点:灌排工程工灌排工程工题库
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