a fairlead block
a swivel pin for the topping lift block
a triangular steel plate with a hole at each corner
the lower block of a multiple part topping lift
第1题：
With a given load on the cargo hook，tension in a single span topping lift ______.
A.increases as the boom's angle to the horizontal increases
B.is at a maximum when the boom is at a 45° angle to the horizontal
C.increases as the boom's angle to the horizontal decreases
D.decreases as the boom's angle to the horizontal decreases
第2题：
topping lift（）
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：
板块构造（plate tectonics）
第5题：
集装箱船舶吊装卸作业方式（Lift on/Lift off system）有何优点？
第6题：
The type of joint formed when an edge of one plate is laid over the edge of the plate to which it is riveted is a ______．
A.Grip joint
B.Strap joint
C.Thread joint
D.Lap joint
第7题：
The jumbo boom can （）.
第8题：
A band or collar on the top end of a boom to which the topping lift，midships guy，and outboard guys are secured，is called the ______.
A.collar band
B.guy band
C.pad eye collar
D.spider band
第9题：
英译中：Number plate
第10题：
滑车（）