单选题The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears, propeller shafts, and generators by the （）.AflywheelBcrankshaftCjournal bearingsDcamshaft
单选题
The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears, propeller shafts, and generators by the （）.
A
flywheel
B
crankshaft
C
journal bearings
D
camshaft
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