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單項(xiàng)選擇題

The （） is not properly set thus causing either advanced or retarded firing.

A.piston
B.fuel injection pump
C.crankshaft
D.oil can

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單項(xiàng)選擇題

The （） engine is used for alternators and some times for main propulsion with a gearbox to provide a propeller of between 90 to 120 rpm.

A.four-stroke
B.two-stroke
C.slow speed
D.reversible

單項(xiàng)選擇題

The （） of the main shaft should be measured with a （）.

A.clearance；calipers
B.sinking；bridge gauge
C.diameter；bridge gauge
D.clearance；lead wire

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