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單項(xiàng)選擇題

The crankshaft is of the semi built type, with the journal （） the forged or cast steel crank throws.

A.being shrunk into
B.to be shrunk into
C.to be shrunk with
D.shrinking into

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單項(xiàng)選擇題

The crankshaft deflection is at first to be （） before and after repair.

A.disassembled
B.renewed
C.measured
D.regulated

單項(xiàng)選擇題

The crank-room cover should not be opened until at least （） minutes after the engine stops.

A.one
B.fifteen
C.sixty
D.ninety

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