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

<blockquote id="lcuw1"></blockquote>

<ins id="lcuw1"></ins>

單項選擇題

Each crank is made up of two crank webs joined by a common（） to which the bottom endbearing is fitted.

A.throw
B.crankshaft
C.crankpin
D.crosshead

你可能感興趣的試題

單項選擇題

During working, when the piston is near the （）, the air ignites the fine spray of fuel.

A.TDC
B.DTC
C.BDC
D.BCD

單項選擇題

During the suction stroke, the piston is moving （）.

A.inwards
B.outwards
C.downwards
D.upwards

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