97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

<sub id="5x2lw"><strong id="5x2lw"></strong></sub>

<pre id="5x2lw"><strong id="5x2lw"></strong></pre>

單項選擇題

Either a low injection pressure or a leakage of piston rings is able to lead （）.

A.a high exhaust temperature
B.a high smoky exhaust
C.a high output
D.a high compression

你可能感興趣的試題

單項選擇題

Each piston stuffing box is provided with two sealing rings and three（）

A.packings
B.piston rings
C.distributor rings
D.scraper rings

單項選擇題

Each journal and pin should be examined for （） and grooving.

A.bridges
B.recesses
C.rears
D.ridging

<pre id="bp3r0"><acronym id="bp3r0"></acronym></pre>