DTH drill pipe, drill pipe of 76 DTH 
 DTH drill pipe is a new type of DTH drill pipe, rod tube, male and female connectors, rod tube, male and female connectors to open the axial hole, End of male and female connectors front-end to interference with the way embedded into the axial hole of the rod cylinder from both ends of the rod tube; DTH drill pipe male and female connectors with shaft shoulder end of the shaft shoulder, the rod tube end, male and female connectors of the soldered connection. DTH drill pipe is the radial interference between the new rod tube with male and female connector with the connection, but also from the axial end connected by welding, high torsional strength and thus the potential hole drill pipe to meet the rig's chisel rock needs; with less investment in equipment, light weight drill pipe. 
 DTH drill rod construct: DTH drill rod by rod tube [3], [4] male [1] and female connectors composed of rod tube, open male and female connectors axial through-hole male [1 [4] front-end] front-end male thread, female connectors [4] back-end with the male external thread with internal thread 76 DTH drill pipe characterized in that [1] backend of the male and female connectors to thermal interference with the way [3] at both ends of the rod cylinder rod cylinder embedded in the axial through hole; male [1] and female connectors [4] has a shaft shoulder [2], rod tube [3] at both ends, respectively, and the public joints [1], shaft shoulder [4] [2] end of the female connectors connected by welding. 1 m in length --- 10 meters can be customized. DTH DTH drill pipe, drill pipe 60 76 DTH drill pipe DTH Bits