起升速度与小车运行速度的增加，提高了搬运效率。
The increase of lifting speed and trolley travelling speed have raised handling efficiency.
常规机械式修井机每一档下的管柱起升速度为常量。
The tubing string lifting velocity of the conventional mechanic rig under each particular gear is constant.
除了标准起升速度外，还有多种速度可供选择，也可选用变频控制起升。
There are many optional speed levels and frequency control lifting except the standard speed.
应用推荐