单项选择题
A.mechanical lubricator B.lubrication function C.forced feed system D.bearing lubrication
The cleaned heated oil, after passing through the centr...
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
The cast iron guide-ways for （） are attached to the top...
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
The cast iron（）for the cross-head are attached to the t...
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
