干式电煤钻杆
干式电煤钻杆/ Dry type electric coal drill pipe
干式电煤钻杆采用钢材，经特殊加工处理，提高了钻杆的强度、硬度和耐磨性，延长了使用寿命，提高了经济效益。
直径：Φ27、Φ38长度:0.5m-5m
Dry type electric coal drill pipe is made of high quality steel, through special processing, improve the strength, hardness and wear resistance of drill pipe, prolong the service life, improve the economicbenerit
Diameter:Φ27,Φ38 length: 0.5m to 5m
