drilling rig,Drilling Rig,30,40,50,70,90DBS,drill rig,factory price,09new style,tech from USADec 21, 2012
... drilling rig,drill rig ,Drilling Rig,API 4F,8A export 100% to USAChina factory pricesWe are ... structure and reliable performance. Adopting constant WOB auto-bit-feed device, a patent of Honghua , the ... )1700(170)2250(225)3150(315)4500(450)Drill line number810101212Dia. of wireline, mm2929323538Max. pull of ... drilling rig,Drilling Rig,30,40,50,70,90DBS,drill rig,factory price,09new style,tech from USA