There is no power for the ().
第1题:
A ()is used for lifting long heavy cargo.
第2题:
请把吊杆甩到舱口上方好吗?()
第3题:
What cargo does a jumbo boom or heavy derrick used for lifting?
第4题:
This ()was repaired in Singapore.
第5题:
The ()of the derrick is out of order.
第6题:
The ()(双杆联吊) is that two booms are used with a single hook.
第7题:
The()(千斤索) is a wire used to take the weight off.
第8题:
heavy derrick()
第9题:
I think you’d better use the ()(岸吊).
第10题:
Four ()are needed to work this heavy derrick.