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

單項(xiàng)選擇題

Aboard ship，vertical flat plates running transversely and connecting the vertical keel to the margin plates are called（）.

A.floors
B.intercostals
C.girders
D.stringers

你可能感興趣的試題

單項(xiàng)選擇題

A wooden float placed between a ship and a dock to prevent damage to both is called a（）.

A.camel
B.dolphin
C.rat guard
D.wedge

單項(xiàng)選擇題

A term applied to the bottom shell plating in a double-bottom ship is（）.

A.bottom floor
B.outer bottom
C.shear plating
D.tank top

<pre id="e5v9p"><strong id="e5v9p"></strong></pre>

<ins id="e5v9p"><xmp id="e5v9p"></xmp></ins>