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
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相关考题
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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 -
单项选择题
The lower end of each piston rod is reduced in diameter to fit a bore in （）.
A.the crosshead
B.the journals of the crosshead
C.the crosshead shoes
D.the guides
