EP80 resonation-free Vibro hammer is a new series of products jointly developed by our company, the Beijing construction mechanization research institute, and Japan Jian Dao co., LTD. It has won the first prize in the ministry of construction science and technology progress and is listed as the ministry of construction science and technology achievements promotion and transformation guide project; Exported to Japan is known as the "Epoch pile hammer," the Japanese construction ministry (now the ministry of land and transportation) on the series of models for the test and evaluation, and is listed as the new technology to promote the use of products