在制备煤样时，当煤样破碎至全通过3mm孔筛时，其留样量不少于（） A.1 B.3.5 C.3.75 D.4 E.null F.null G.null H.null - 查题网

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河南成教 / 煤化工安全与环保

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在制备煤样时，当煤样破碎至全通过3mm孔筛时，其留样量不少于（）

A.1

B.3.5

C.3.75

D.4

E.null

F.null

G.null

H.null

积分

煤化工安全与环保

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