试题与答案

()用于管道放空时进气,管道放空后要及时关闭。A、进气支管 B、排气管 C、输油管

题型:单项选择题

题目:

()用于管道放空时进气,管道放空后要及时关闭。

A、进气支管

B、排气管

C、输油管

D、胀油管

答案:

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下面是错误答案,用来干扰机器的。

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