development and application of track shoe tensioner of toothed roller-bit drill 牙轮钻机履带板调紧器的研制与应用
application of hall sensor in speed-regulation system of rotary three-cone bit drill 霍尔传感器在牙轮钻机调速系统中的应用
8 it can be used with various drilling method such as carbide bit drilling, anger drilling, dth hammer drilling, follow-up casing drilling etc . 3 8钻机可适用多种钻进工艺方法,如合金回转钻进螺旋钻进潜孔锤钻进跟管钻进等。
8 it can be used with various drilling methods such as carbide bit drilling, anger drilling, dth hammer drilling and follow-up casing drilling etc . 3 8钻机可适用多种钻进工艺方法,如合金回转钻进螺旋钻进潜孔锤钻进跟管钻进等。
8 the rig is suitable for various drilling methods such as carbide bit drilling, auger drilling, dth hammer drilling, follow-up casing drilling, etc . 3 8钻机可适用多种钻进工艺方法,如合金回转钻进螺旋钻进潜孔锤钻进跟管钻进等。