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

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

單項選擇題

Before replacing a piston you should check the rings to see that all clearances and gaps are （） the permissible tolerances.

A.above
B.at
C.over
D.within

你可能感興趣的試題

單項選擇題

Before replacing a piston you should check that all rings are （）.

A.free
B.fastened
C.broken
D.stuck

單項選擇題

Before pumping up the crankcase oil,（） should be worked by hand to minimize corrosive action on the liners.

A.the indicators
B.the starting valves
C.the cylinder lubricators
D.the turning gear

<ruby id="or95r"><output id="or95r"></output></ruby>

<pre id="or95r"><strong id="or95r"></strong></pre>