1, the machine uses a double control increases the stability of the machine. 2, the transmission gear using pure copper production has greatly enhanced the torque force enhanced wear resistance. 3, double-blade welded drill digging enhanced effect, unearthed rate of 90%. With centering drill. 4, the drill bit using more rigid synthetic manganese. For hard soil, hard soil, clay, permafrost, etc. can be very effective in the implementation of its work, and to achieve the best job requirements at http://www.dhwkjsb.com http:.? //www.dhjxsb. com? Address Gongyi City warehouse Nishimura Contact Pan Jingli Tel 13623866286