XZ320D HDD machine12000N.M max torqueEnigne power 153kwMax back reamer force 320kNPipe size 73mm*3meterXZ400A HDD machine14000N.M max torqueEnigne power 178kwMax back reamer force 400kNPipe size 83/89mm*4.5meterWith the development of the city, more and more horizontal directional drilling machine i