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单选题
A snatch block is a（）.
A
block used only with manila rope
B
chock roller
C
hinged block
D
strong block used for short，sharp pulls
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单选题A snatch block would most likely be used as a（）.A
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单选题A “stopper” is（）.A
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V$BLOCK_CHANGE_TRACKING C
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考题
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