掘进机喷雾系统耐压试验时,将喷雾系统的压力调至额定压力的()倍,保压3min,要求不

题型:单项选择题

问题:

掘进机喷雾系统耐压试验时,将喷雾系统的压力调至额定压力的()倍,保压3min,要求不得有渗漏及损坏现象。

A、1.2

B、1.5

C、1.8

D、2

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