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單項(xiàng)選擇題

After "F.W.E" is given, the air system is shut down, the （） gear put in, all drains and indicator cocks opened, and the cooling water kept running.

A.steering
B.timing
C.turning
D.running

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單項(xiàng)選擇題

A-frames are mounted on the bed plate and support （） and cylinder block.

A.the main bearing
B.the cylinder cover
C.the entablature
D.the sump

單項(xiàng)選擇題

A-frames and cylinder block is held together by （） to form a rigid structure.

A.connecting rods
B.piston rods
C.tie rods
D.jack-bolts

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