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The（）(千斤索) is a wire used to take the weight off.
- A、light derrick
- B、union purchase
- C、topping lift
- D、heavy derrick
参考答案
更多 “The（）(千斤索) is a wire used to take the weight off.A、light derrickB、union purchaseC、topping liftD、heavy derrick” 相关考题
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吊杆的部件有：吊杆支架、鹅颈头、中心稳索、支索、千斤索和千斤索滑车组等。B
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