double groove 双面坡口 ; 双槽 ; 双面槽 ; 双边坡口
double groove weld 双面坡口焊缝 ; 双槽焊
double groove continuous extruding machine 双槽连续挤压机
double groove joint 双面坡口接头
double-bevel groove weld 双斜边坡口焊缝 ; [机] 双斜坡口焊 ; 双面斜坡口对接焊缝
double-V groove weld 双斜坡口焊 ; 双斜边坡口焊缝
double-groove hub 双槽轮毂
double-groove weld 双面铲边焊缝
The wheel flange wear is caused by the flange action of the wheel and rail, whereas the double-groove wear on tread may be mainly caused by the break shoe.
轮缘磨耗主要是轮轨相互作用的结果，而踏面上的凹槽磨耗可能主要由闸瓦制动引起。
At the base of the groove, there is a single or double diameter hole, providing a sound path through the panel.
在该基地的沟，有一个单人或双人直径孔，提供一个良好的道路通过小组。
By varying the groove spacing, the diameter of the single or double diameter hole, and the rear air cavity depth and content, one can obtain absorption over a wide variety of frequencies.
通过改变槽间距，直径的单人或双人直径孔，与后方空气腔的深度和内容，就可以得到吸收超过各种各样的频率。
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