单选题可移动索具应用润滑油润滑活动部件,加润滑油的间隔不得超过()。A一个月B三个月C六个月D十二个月
单选题
可移动索具应用润滑油润滑活动部件,加润滑油的间隔不得超过()。
A
一个月
B
三个月
C
六个月
D
十二个月
参考解析
解析:
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