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

<nobr id="a3yhx"></nobr>

<acronym id="a3yhx"><thead id="a3yhx"></thead></acronym>

單項選擇題

Opening of the cylinder （） will admit compressed air into the cylinder.

A.safety valve
B.indicator cock
C.blow-down valve
D.start valve

你可能感興趣的試題

單項選擇題

Once all cylinders are firing regularly, （） is shut off.

A.the exhaust valve
B.the starting air
C.the inlet valve
D.the fuel oil

單項選擇題

Once a scavenge fire is detected, fuel should be shut off from the affected cylinders and cylinder lubrication increased （） the risk of seizure.

A.to protect
B.to guard
C.to maximize
D.to minimize

<optgroup id="dm3wg"><i id="dm3wg"></i></optgroup>

<acronym id="dm3wg"><address id="dm3wg"><table id="dm3wg"></table></address></acronym>

<address id="dm3wg"></address>

<optgroup id="dm3wg"></optgroup>