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

<dl id="0msis"></dl>

單項選擇題

The joint formed when two steel plates are placed end-to-end is called a（）.

A.bevel
B.seam
C.butt
D.bond

你可能感興趣的試題

單項選擇題

The inner bottom is the（）.

A.tank top
B.compartment between the tank top and shell of the vessel
C.inner side of the vessel's shell
D.space between two transverse bottom frames

單項選擇題

The flood stream here is at an average rate of 0.8（）.

A.cables
B.miles
C.kilometers
D.knot