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公司介绍 The modern society, the corporation’s efficiency  competition  is the quotation of the management level and the science and  technology. Dare to discard,boldly out of the old inefficient equipment is  policy-maker's wise choice! The YY28 hydraulic rock drill is a new  generation drilling equipments of our factory ,which takes more than 20 year  careful development. And Obtained the "National Key New Product" and  "Technical department Innovation Fund". A number of patented technology  makes this product  has many outstanding features: small original driving force, fast speed,  stability control, low noise,simple,reliable, easy maintenance, flexible and  mobile etc. Nowadays,YY28 has been accepted and widely used in  many  departments such as the highway and railway tunnel, the electricity and  hydraulic projects, the building materials and quarrying department etc.And the  users define  YY28 as the   http://www.dsrockdrill.com