东营市东安镇青州路150号, Dongying, Shandong, China,
Driling andProduction Tools Manufactory ofShengli oilfield Gubang Petroleum Equipment Co,Ltd. Was founded in1989. It is located in Dongying city of Shangdong Province whereHuanghe River enters the sea . only professionalmanufactory casing ...
casing centralizers,locking rings,float collar & float shoes,pdc bits,central cooler
