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

單項(xiàng)選擇題

Shims of different thicknesses are inserted between the shells to enable adjustment of （）.

A.the bearing clearances
B.the bearing thickness
C.the bearing strength
D.the bridge hardness

你可能感興趣的試題

單項(xiàng)選擇題

Sediment collects in a tubular purifier （）.

A.on top cover
B.on sides of bowl
C.in drain line on the discs
D.on the discs

單項(xiàng)選擇題

Sea water is not used directly as a coolant because of （）.

A.low specific heat
B.high specific heat
C.corrosive action
D.high viscosity

<ins id="ke95o"></ins>