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單項選擇題

Worn out ring grooves should be （） to standard dimension after being welded.

A.machined
B.bored
C.honed
D.drilled

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單項選擇題

With VIT unit the timing of fuel injection of an engine can be regulated automatically according to the （）.

A.ship draft
B.pitch
C.engine load
D.oil viscosity

單項選擇題

With VIT the start of injection may be （） as the engine load is reduced within a certain range.

A.advanced
B.retarded
C.relayed
D.cut off

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