正确答案: C
每一级
题目:空压机通常在( )后面设安全阀。
解析:C
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举一反三的答案和解析:
[单选题]急性出血性休克的常见原因是______引起的。
急剧大量地出血
[单选题]The bearing of tailshaft sealing equipment which adopts the oil nature circulation is hot, the reason is
the ventilation tube clogged
[单选题]UMS stands for
unattended machinery space