<p>Zhengzhou Dayu Machinery Co., Ltd. is a leading mining machinery supplier in China, was established in September 1992. Dayu supply <a class="simply_extern" href="http://www.dydrillingrig.com/product.html" title="drilling" >drilling</a> rigs and <a class="simply_extern" href="http://www.dydrillingrig.com/products/air-compressor/diesel-movable-screw-air-compressor.html" title="air compressors" >air compressors</a> base on ISO9001,ISO14001 management systems, and are CE,GOST certified.</p><p>Business scope:&nbsp;Mining crawler drilling rigs, hydraulic&nbsp;drilling rigs, core drilling rigs, rotary drilling rigs, borehole <a class="simply_extern" href="http://www.dydrillingrig.com/" title="drilling rig" >drilling rig</a>,&nbsp;down&nbsp;the&nbsp;hole mining <a class="simply_extern" href="http://www.dydrillingrig.com/products/down-the-hole-drilling-rigs.html" title="drilling machine" >drilling machine</a>, crawler water <a class="simply_extern" href="http://www.dydrillingrig.com/products/crawler-water-well-drilling-rigs.html" title="well drilling rigs" >well drilling rigs</a>, truck mounted water <a class="simply_extern" href="http://www.dydrillingrig.com/products/crawler-water-well-drilling-rigs.html" title="well drilling" >well drilling</a> rigs, diesel movable <a class="simply_extern" href="http://www.dydrillingrig.com/products/air-compressor/electric-movable-screw-air-compressor.html" title="screw air compressor" >screw air compressor</a>, electric <a class="simply_extern" href="http://www.dydrillingrig.com/products/air-compressor/electric-movable-screw-air-compressor.html" title="movable screw air compressor" >movable screw air compressor</a> and so on.</p><p>Dayu drilling rigs and air compressors, are used all over China and have exported to Europe, Russia, the Middle East, Brazil, India, Australia, South Africa, Malaysia, Kazakhstan, Egypt, Peru etc. <a href="http://www.dydrillingrig.com/about-us.html">Read more...</a></p>