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單項選擇題

The cylinder covers and the liners are bolted together by means of studs （） the cylinder frames.

A.screwing into
B.being screw on
C.to screw on
D.screwed into

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單項選擇題

The cylinder covers and the liners are bolted together by means of （）.

A.bolts welded into the cylinder head
B.bolts welded into the cylinder frames
C.studs screwed into the cylinder head
D.studs screwed into the cylinder frames

單項選擇題

The cylinder cover is not provided with （）.

A.fuel valve
B.lubricator
C.indicator valve
D.the starting valve