单项选择题
A.oil sump B.oil separator C.outlet pipe D.inlet pipe
During working of an air compressor, （） should be drain...
单项选择题During working of an air compressor, （） should be drained.
A.inter cooler B.cylinder C.outlet pipe D.inlet pipe
Before starting an air compressor, It should be （）.A.un...
单项选择题Before starting an air compressor, It should be （）.
A.unloaded B.primed C.filled with water D.greased
Before starting an air compressor, It should be （）.A.tu...
A.turned B.oil level checked C.filled with water D.A and B
