99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精

<i id="5l04b"><button id="5l04b"><legend id="5l04b"></legend></button></i>

<ruby id="5l04b"><xmp id="5l04b"></xmp></ruby>

<ruby id="5l04b"><xmp id="5l04b"></xmp></ruby>

<ruby id="5l04b"><xmp id="5l04b"></xmp></ruby>

<em id="5l04b"><xmp id="5l04b"></xmp></em>

單項選擇題

In a four-cycle diesel engine piston blow-by can result in increased（）

A.crankcase pressure
B.compression pressure
C.scavenge pressure
D.exhaust manifold pressure

你可能感興趣的試題

單項選擇題

The most effective method in removing water from diesel fuel oil is by（）

A.centrifuging the fuel
B.using it in the engine
C.heating the fuel tanks
D.starting the fuel

單項選擇題

On board supply vessels, a centrifuge is normally used to purify（）

A.cooling water
B.fuel oil
C.sea water
D.diesel intake air