干式電煤鉆桿
干式電煤鉆桿/ Dry type electric coal drill pipe
干式電煤鉆桿采用鋼材，經特殊加工處理，提高了鉆桿的強度、硬度和耐磨性，延長了使用壽命，提高了經濟效益。
直徑：Φ27、Φ38長度: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
