The hydraulic seam drill is equipped with the synchronous gear motor as the driving part, which can effectively solve the corrosive problem of the emulsion to the motor body.
乳化液煤层液压钻使用同步马达作为其驱动元件，可有效解决乳化液对马达机体的腐蚀问题。
During drilling process, screw drill motor sometimes doesn't work properly or even seriously damaged because of sand jamming.
在钻井施工作业中，螺杆钻具常因砂卡导致螺杆马达工作失效，导致螺杆钻具报废，严重影响了正常钻井作业。
After pearl rotates for 180 o, pull (1) hand towards motor, then begin to drill hole until the pearl is holed through.
珍珠翻转180度以后，向电机方向扳动1手柄，再次实施打孔，通孔即完成。
The performance difference between air crew drill and mud motor was analyzed under the air drilling condition.
对比分析了空气螺杆钻具与泥浆马达在空气钻井井况下的性能差异。
In order to improve the service performance of emulsion motor which is the most important component of drill rig, emulsion motor's structure and design method were studied.
为了提高钻机核心部件——乳化液马达——的性能，对乳化液马达的结构、设计方法进行了研究。
One great-torque motor with proper power is made to match with the rotary churn unit in pneumatic drill to form the electric pneumatic drill as one kind of powerful electrically driven tool.
将适当功率的大扭矩特种电动机与气动风炮上的旋转式冲击装置相匹配而产生出的一种有着强冲击扭力的电动工具――电动风炮。
One great-torque motor with proper power is made to match with the rotary churn unit in pneumatic drill to form the electric pneumatic drill as one kind of powerful electrically driven tool.
将适当功率的大扭矩特种电动机与气动风炮上的旋转式冲击装置相匹配而产生出的一种有着强冲击扭力的电动工具――电动风炮。
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