A.孔深×孔數(shù)×5%÷5 B.孔深×孔數(shù)÷5 C.孔深×孔數(shù)×5% D.孔數(shù)×5%
A.5% B.10% C.8% D.3%
A.泥漿外運 B.制備泥漿 C.井口護(hù)筒埋設(shè) D.操作平臺