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

<pre id="ikmfp"><acronym id="ikmfp"></acronym></pre>

單項選擇題

0n a vessel ,a C0₂ extinguisher is checked by（）.

A.reading the gage pressure
B.weighing the extinguisher
C.discharging a small amount of CO₂
D.seeing if the seal has been broken

你可能感興趣的試題

單項選擇題

0n a vessel,multipiying a load’s weight by the distance of the load’s center of gravity above the baseline results in a(n)（）.

A.transverse moment
B.vertical moment
C.righting moment
D.inclining moment

單項選擇題

0n cargo booms,preventers are（）.

A.auxiliary guys
B.extra fair leads
C.steel bands
D.stops

<ruby id="gftnr"><xmp id="gftnr"></xmp></ruby>

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