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

<em id="kzh5t"></em>

單項選擇題

Generally speaking，the fuel injected into a marine diesel engine combustion chamber is ignited by（）.

A.spark plugs
B.glow plugs
C.heat of compression
D.a magneto

你可能感興趣的試題

單項選擇題

For most ship engines，the fuel is（）.

A.natural gas
B.diesel oil
C.propane
D.bunker fuel

單項選擇題

Diesel engines obtain combustion air through turbo chargers，blowers，or（）.

A.air starters
B.carburetors
C.natural aspiration
D.air receivers