The process of lowering a boom to a horizo
题型:单项选择题
问题:
The process of lowering a boom to a horizontal position and onto its deck support is called().
A.spotting a boom
B.collaring a boom
C.cradling a boom
D.toppling a boom
The process of lowering a boom to a horizontal position and onto its deck support is called().
A.spotting a boom
B.collaring a boom
C.cradling a boom
D.toppling a boom