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
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相关考题
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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 -
单项选择题
The pistons are cooled by oil supplied from the forced （） system.
A.fresh water
B.sea water
C.lubrication
D.fuel oil -
单项选择题
The piston supporting body is mainly subjected to （） stress.
A.pushing
B.centrifugal
C.stretch
D.compressive
