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单选题
When the derrick is stopped, the guy must be().
A
take in
B
slacked off
C
stowed
D
taken
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单选题The preventer guy,as used on a conventional yard and stay rig,().A
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单选题When the derrick is topped, the guy must be ()(放松).A
slacked offB
sent awayC
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taken in
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单选题The ()(吊杆托架) supports the derrick.A
derrick boom restB
derrick headC
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derrick guy
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slacked offB
taken inC
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单选题吊杆停用时,稳索必须要收起来。()A
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When the derrick is stopped, the guy must be topped.C
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When the guy is stopped, the derrick must be stowed.
考题
单选题When the derrick is stopped, the guy must be ()(收好).A
taken inB
slacked offC
adjustedD
stowed
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