单项选择题
The common method of applying oil to the cylinder walls is by means of small pump assembled in units, known as （）.
A.mechanical lubricator
B.lubrication function
C.forced feed system
D.bearing lubrication
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相关考题
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单项选择题
The cleaned heated oil, after passing through the centrifuges, is to be pumped to a （）.
A.settling tank
B.service tank
C.ballast tank
D.drain tank -
单项选择题
The cast iron guide-ways for （） are attached to the top section and seal off the crankcase.
A.the connecting rod
B.the cross-head
C.the piston rod
D.the air box -
单项选择题
The cast iron（）for the cross-head are attached to the top section and seal off the crankcase.
A.cylinder cover
B.cross-head shoes
C.guide-ways
D.scavenging boxes
