单项选择题
A.unloaded B.primed C.filled with water D.greased
Before starting an air compressor, It should be （）.A.tu...
单项选择题Before starting an air compressor, It should be （）.
A.turned B.oil level checked C.filled with water D.A and B
The air compressor pumps air to the（）.A.engine cylinder...
单项选择题The air compressor pumps air to the（）.
A.engine cylinder B.air bottle C.evaporator D.condenser
The air compressor pumps air to the （）.A.expansion tank...
单项选择题The air compressor pumps air to the （）.
A.expansion tank B.combustion chamber C.air receiver D.evaporator
