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
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相关考题
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单项选择题
The air compressor pumps air to the（）.
A.engine cylinder
B.air bottle
C.evaporator
D.condenser -
单项选择题
The air compressor pumps air to the （）.
A.expansion tank
B.combustion chamber
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D.evaporator -
单项选择题
The air compressor pumps air to the （）.
A.air cylinder
B.combustion chamber
C.steam drum
D.expansion tank
