重吊杆吊重货和集装箱货。
龙门吊能起吊重件货，重吊杆能起吊集装箱。
重吊杆能起吊重件货，龙门吊能起吊集装箱。
龙门吊吊重货和集装箱货。
第1题：
When a cargo boom or crane is rated at varying capacities，there will be a table at the controls which relates safe working load to ______．
A.winch speed
B.boom strength
C.load radius
D.cable strength
第2题：
The jumbo boom can （）.
第3题：
Stress on the topping lift of a swinging boom can be reduced by ______.
A.rigging a back stay
B.raising the boom
C.increasing the mechanical advantage of the cargo purchase
D.taking all slack out of the preventer
第4题：
Heavy cargo might break （）cargo, so it can’t be stowed on top of it.
第5题：
The （）(浮吊) can float on water used to load and unload the cargo.
第6题：
Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom ________．
A.Cargo whip
B.Gooseneck fitting
C.Spider band
D.Topping lift
第7题：
The jumbo boom can lift heavy cargo, the gantry crane can hoist containers.（）
第8题：
What cargo does a jumbo boom or heavy derrick used for lifting?
第9题：
A （）is used for lifting long heavy cargo.
第10题：
The （）(笨重货) must be handled by jumbo boom or shore crane.