单项选择题
A.the guideway B.the piston rod C.the crosshead shoes D.the interlocked circlip
The ports are drilled in the liners at an angle of appr...
单项选择题The ports are drilled in the liners at an angle of approx 20℃ the result being that （） is given a rotary movement.
A.the scavenging air B.the exhaust gases C.the mixed air D.the spray oil
The plunger may be rotated in the barrel by a rack and ...
单项选择题The plunger may be rotated in the barrel by a rack and （） on a sleeve which is keyed to the plunger.
A.pinion arrangement B.push rod C.handle bar D.cam device
The plunger in the fuel injector pump, usually operated...
单项选择题The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.
A.crankshaft B.camshaft C.piston rod D.rack and pinion
