无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

<ins id="2mkcx"><output id="2mkcx"></output></ins>

單項(xiàng)選擇題

Differential needle valves used in fuel injectors are directly closed by（）

A.cam action
B.spring force
C.fuel oil pressure
D.firing pressure

你可能感興趣的試題

單項(xiàng)選擇題

In a closed cooling water system, which of the problems can cause the water pressure to fluctuate?（）

A.An open vent in the cooling system
B.A fouled sea chest
C.A restricted water passage in the engine
D.Air entrained in the cooling water

單項(xiàng)選擇題

Proper dispersion of fuel in a diesel engine cylinder is dependent upon the （）

A.injection pressure
B.shape of combustion space
C.turbulence in combustion space
D.all of the above

<ruby id="il2zo"><xmp id="il2zo"></xmp></ruby>

<dl id="il2zo"><strong id="il2zo"></strong></dl>

<dl id="il2zo"></dl>

<pre id="il2zo"><strong id="il2zo"></strong></pre>

<em id="il2zo"></em>