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单项选择题
A.be less than
B.be larger than
C.be as large as
D.not be so large as
单项选择题
A.bosses
B.through bolts
C.machine-turned recesses
D.long studs
单项选择题
A.a mark
B.a bolt
C.a dowel pin
D.a measuring tool
单项选择题
A.gravity disc
B.centrifugal bowl
C.a stack of discs
D.main sealing ring
单项选择题
A.the guideway
B.the piston rod
C.the crosshead shoes
D.the interlocked circlip
单项选择题
A.the scavenging air
B.the exhaust gases
C.the mixed air
D.the spray oil
单项选择题
A.pinion arrangement
B.push rod
C.handle bar
D.cam device
单项选择题
A.crankshaft
B.camshaft
C.piston rod
D.rack and pinion
单项选择题
A.fresh water
B.sea water
C.lubrication
D.fuel oil
单项选择题
A.pushing
B.centrifugal
C.stretch
D.compressive