The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）. -题库考试答案搜索网

The signal man assisting a crane operator has his arm extended with his fingers closed and thumb pointing upward. This is the signal to（）.

单选题

2022-01-10 23:58

A、raise the boom
B、raise the hook
C、raise the boom and hook
D、check the boom sto

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正确答案

A

试题解析

标签：船舶索具名称

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