roll-positioning device 轧辊压下装置
Top roll positioning speed 上辊垂直移动速度
Shifta-Roll Positioning Stands 移动式辊筒导轨支架
roll ball for cursor positioning 标线定位滚球
positioning roll 定位辊
Just as in the freestyle, head positioning plays an important roll in the backstroke.
和自由泳一样，头部的位置对于仰泳来说也是至关重要的。
The utility model relates to a rectangular bearing block rotary positioning device used for the installation, the regulation or the replacement of a roll used for rolling metals.
本实用新型涉及用于金属轧制的轧辊的安装、调节或更换，具体为一种矩形轴承座旋转定位装置。
应用推荐