... USAChina factory pricesWe are manufacturer and OEM of NOV corporation.Core components of drilling rigs are from America. menbers of our sales team ... .productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); drilling rig,Drilling Rig,30,40,50,70,90DBS,drill rig,factory price,09new style,tech from USA