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

<ruby id="nrd4p"><small id="nrd4p"></small></ruby>

<ins id="nrd4p"></ins>

單項選擇題

The thrust from the propeller to the hull of the ship is transferred by（）

A.tie rod
B.thrust block
C.bedplate of main engine
D.frame of main engine

你可能感興趣的試題

單項選擇題

The transmission system transmitting power from the engine to the propeller is composed of shafts, bearings, and（）

A.propeller
B.flying wheel
C.main engine
D.crankshaft

單項選擇題

Which of the followings will affect the spray of fuel oil?（）

A.coke deposits
B.cylinder water temperature
C.asphalt in fuel oil
D.lub oil