单选题The cylinder covers and the liners are bolted together by means of （）.Abolts welded into the cylinder headBbolts welded into the cylinder framesCstuds screwed into the cylinder headDstuds screwed into the cylinder frames
单选题
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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