相关考题
-
单项选择题
What’s the （）of the derrick?
A.SLW
B.LSW
C.SWL
D.FWE -
单项选择题
“SWL” means （）.
A. safe working load
B. safe work load
C. safe worked load
D. safely working load -
单项选择题
（）do you want the derrick adjusted?
A.What
B.Where
C.How
D.When
