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单选题
How should you signal the crane operator to use the main hoist?().
A

Use one hand to give any miotion signal , and place the other hand motionless in front of the hand giving the motion signal

B

Extend arm with the thumb pointing up , and flex the fingers in and out for as long as the load movement is desired

C

First tap your elbow with one hand , and then proceed to use regular signals

D

First tap the top of your head with your first , and then proceed to use regular signals


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更多 “单选题How should you signal the crane operator to use the main hoist?().A Use one hand to give any miotion signal , and place the other hand motionless in front of the hand giving the motion signalB Extend arm with the thumb pointing up , and flex the fingers in and out for as long as the load movement is desiredC First tap your elbow with one hand , and then proceed to use regular signalsD First tap the top of your head with your first , and then proceed to use regular signals” 相关考题
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