Dayu industry co., ltd. is the leading manufacturer of drilling rigs and air compressor in china. there are more than 1000 sets of advanced automatic molding production lines, machining center, heat treatment facilities top-rate testing devices and all kinds of machining process equipments imported from the usa, uk, japan, and germany. the main products including mining drilling rigs, water well drilling rigs, down the hole drill rigs, rock drill rigs, screw air compressor, reciprocating air compressor, cylinder liner for combustion engine, pavement drill machine, down the hole drilling rigs, roof bolting drill, pressure vessel, some 6 categories more than 300 kinds of products. the dayu products have its network throughout the country. with its first-rate sales service, the group has its products exported to the usa, germany, japan, korea, russia, africa, and latin america over 20 countries and regions.