单项选择题
A.landing area and sources of vapor ignition B.main deck C.engine room D.drill floor
During which condition should the operator of a pedesta...
单项选择题During which condition should the operator of a pedestal crane shutdown operations?（）
A.Lightning in the vicinity B.An approaching squall line C.A fire on the pier D.All of the above
A.Lightning B.High winds C.Fire aboard D.All of the above
A.Bunkering barge alongside B.Potable water spill on deck C.Crane hydraulic hose bursts D.Trim greater than 4 feet
