no.560,huanghe road,, binzhou, Shandong, China

Shandong Nine-Ring Petroleum Machinery Co. Ltd. Is a company specializes in producing well pumping unit, oil well pump and sucker rod. Our company is one of the advanced technology enterprise and top ...

Dongying, Shandong, China

Shengli Oilfield Freet Petroleum Equipment CO., Ltd ("Freet") formerly a subsidiary of the Shengli Oilfield, (China&＃039;s 2th largest oilfield, a part of sinopec), with over...