相关考题
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单项选择题
（）should be greased every month or two and it should be kept on a reel when not in use.
A. Wire rope
B. Hemp rope
C. Nylon rope
D. Wooden rope -
单项选择题
Wire rope should be greased （）when not in use.
A. every half a month
B. every month or two
C. every half a year
D. every year -
单项选择题
Coil left-handed ropes （）.
A. clockwise
B. anticlockwise
C. to the center
D. to the left
