■ Description
GD-380T set the current forefront technology of split type pneumatic drilling rig; the prototype has passed 3000 hours of operation test and the field experimentation of four different geological environment, and improve more than ten kinds of mechanical disadvantages, even solved three technical problems---“high failure rate, high air loss, high using cost”. Eventually form the GD-380T with these features as easy operation, low maintenance cost, low air demand and high drilling speed.