A.4.5m B.5.0m C.5.5m D.6m
A.輕型井點(diǎn) B.噴射井點(diǎn) C.電滲井點(diǎn) D.管井井點(diǎn)
A.連續(xù)閃光焊 B.預(yù)熱閃光焊 C.閃光→預(yù)熱→閃光焊 D.連續(xù)預(yù)熱閃光焊