I company is national chisel rock mechanical products of backbone production enterprise, get dive hole rig production license units, which QC70/80/90/100 type dive hole impact device is I company many experience rich of research experts reference both at home and abroad shallow hole rig of latest technology and actual using in the often appeared of problem and concentrated development out of new patent products, widely application Yu railway, and highway, and hydropower, and water, and mine, and quarrying, and building, and ship, based energy construction field, experience years market test, Widely circulated in the credibility and quality of products in the industry. the product structure in the piston, cylinder, valve, check valve and drill accessories installed inside the thin outer cylinder, on the outer cylinder equipped with a wrench and join threads on the connector, the bottom card equipped with a threaded drill sleeve.