Zhengzhou Dayu Machinery Co., Ltd. is a leading mining machinery supplier in China, was established in September 1992, Headquarters is located at Zhengzhou, Henan Province, China. Covering above 18, 000 square meters and registering capital of RMB 50 million. Dayu supply drilling rigs and air compressors base on ISO9001,ISO14001management systems, and are CE,GOST certified. Business scope: All Pneumatic Mining Crawler Drilling Rigs,Hydraulic Mining Crawler Mining Drilling Rigs,Integrated Mining Crawler Drilling Rigs,Down Hole Mining Drilling Machine,Crawler Water Well Drilling Rigs,Truck Mounted Water Well Drilling Rigs,hydraulic drilling rig,Diesel Movable Screw Air Compressor,Electric Movable Screw Air Compressor,Movable Piston Air Compressor and so on. Dayu drilling rigs and air compressors, are used all over China and have exported to Europe, America, Russia, the Middle East, Brazil, India, Australia, South Africa, Malaysia, Kazakhstan, Egypt, Peru etc. Quality control is the highest priority. Highly skilled and educated employees manufacture our products in a modern facility, which incorporates C.A.D. (Computer Aided Design), C.A.M. (Computer Aided Manufacturing) and C.N.C. (Computer Numeric Controlled) manufacturing techniques. Dayu is committed to being the best in the business. From your initial enquiry, through the stages of order processing, manufacture, delivery and after sales service, all our staffs are determined to exceed your expectations. We recognize that this is critical to winning repeat business and building a long-term business relationship, which in turn is critical to our success.