单项选择题
The lubricating pipes and dusts should be blown out with （）.
A.atmosphere
B.the fresh water
C.compressed air
D.chemical compounds
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相关考题
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单项选择题
The lubricating oil is pumped from the drain tank, very often with （） in the suction line.
A.a filter
B.a strainer
C.a magnetic filter
D.a fine strainer -
单项选择题
The lube oil in the bearings is drawn from a （）, usually located in the bedplate.
A.tank
B.sump
C.vessel
D.bottle -
单项选择题
The lowest ring of a piston is （）.
A.a coil spring
B.a sealing ring
C.an oil distributor ring
D.main seal ring
