单项选择题

The （）(千斤滑车) can run the gooseneck.

A. heavy derrick
B. pulley block
C. topping lift block
D. guy tackle

点击查看答案&解析

上一题目录下一题

单项选择题

A. heavy cargo derrick
B. heavy deck
C. jumbo boom
D. heavy block

单项选择题

A. light derrick
B. union purchase
C. topping lift
D. heavy derrick

单项选择题

A. derrick
B. union purchase
C. topping lift block
D. crane