單項(xiàng)選擇題

What’s the （）of the derrick?

A.SLW
B.LSW
C.SWL
D.FWE

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單項(xiàng)選擇題

“SWL” means （）.

A. safe working load
B. safe work load
C. safe worked load
D. safely working load

單項(xiàng)選擇題

（）do you want the derrick adjusted?

A.What
B.Where
C.How
D.When

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