单项选择题X 纠错
A.oil rings only
B.compression and scraper rings
C.cylinder liner sealings
D.cylinder liner ring grooves
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单项选择题
A.wrist pin bushings
B.compression rings
C.cylinder liner seals
D.cylinder liner sealing ring
单项选择题
A.Gasoline
B.Water
C.Lubricating oil
D.sulphur compounds
单项选择题
A.back clearance
B.side clearance
C.gap clearance
D.taper clearance
单项选择题
A.reduce fuel weight
B.increase specific gravity
C.separate fuel from lube oil
D.reduce fuel viscosity
单项选择题
A.valve guides
B.oil control rings
C.valve seats
D.compression rings
