1.
Research on Vector Drive Technology in the Oil Rig Rotary Table Control System;
石油钻机转盘控制系统中矢量调速技术的研究
2.
Application of Combination Construction Method with Rotary Drilling Rig and Rotary Table Rig
旋挖钻机与转盘钻机组合施工法的应用
3.
kelly for well-drilling machiens
旋转钻孔,钻井机用
4.
The substructure adopts heavy load conventional drive self-moving mode and power steering system, which causes the rig good performance of the moving and cross-country.
底盘为重载常驱动自走底盘，采用动力转向系统，钻机的通过性、越野性好。
5.
ON A CONTROL METHOD OF MICROCOMPUTER CONTROL SYSTEM FOR DISC BRAKE AUTODRILLER
钻机盘式刹车自动送钻微机控制方法的研究
6.
chain out the hole
起钻时不用转盘而用旋绳器卸扣
7.
Safety of disc brake automatic driller system
钻机盘式刹车自动送钻中的安全性研究
8.
engine ,drill, dental, with swivel arm
牙科钻机,带旋转杆
9.
great lengths of drill pipe which are rotated by an engine at the top,
钻杆顶部安装的发动机带动钻杆旋转，
10.
The Safety Protection Function of Disc Brake on Oil Drilling Rig
石油钻机用盘式刹车的安全保护功能
11.
a drill consisting of a bit and a brace to hold and turn it.
有钻头和可以握住和旋转的手柄的钻机。
12.
Structural Design and Mechanism Study on Water-saving Rotary Percussive Devices;
节水型回转冲击钻具结构设计与钻进机理研究
13.
Research on Load Self-adapting of Rotating System in Measuring Drill
随钻测量钻机回转系统负载自适应研究
14.
rotary table type surface treatment machine
回转盘式表面处理机
15.
high speed rotating dish spray drier
高速转盘喷雾干燥机
16.
under runner sheller
下磨盘转动式碾米机
17.
hydromechanical drive rotary torque
液压-机械驱动转盘扭矩
18.
The circular horizontal rotating platform of a phonograph on which the record is placed.
唱机转盘电唱机上支承唱片的水平转盘