试题与答案

不漏油:移动设备的固定接合部位允许有油迹,擦干后30s不见油;转动部位()分钟不成滴

题型:单项选择题

题目:

不漏油:移动设备的固定接合部位允许有油迹,擦干后30s不见油;转动部位()分钟不成滴。

A、1

B、2

C、5

答案:

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