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

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單項選擇題

The cylinder cover is not provided with （）.

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

單項選擇題

The cylinder contains a great weight of air and is capable of burning a great quantity of fuel at（）.

A.the beginning of the compression stroke
B.the beginning of the suction stroke
C.the end of the working stroke
D.the end of the exhaust stroke