问题
单项选择题
opes or wires attached to derricks to prevent them from swinging during cargo handling operations are（）.
A.Preventers
B.Side ropes
C.Stays
D.Guide lines
答案
参考答案：A
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opes or wires attached to derricks to prevent them from swinging during cargo handling operations are（）.
A.Preventers
B.Side ropes
C.Stays
D.Guide lines
参考答案：A