Lv Fengmei

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Dongying City, CN

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Patents Applicationslast 30 patents

Information Patent Application
PLUNGER FOR LIFITING FLUIDS WITHIN A TUBING STRING
- Publication number 20160237795
- Publication date Aug 18, 2016
- Shenji Oilfield Shengli Petroleum Equipment Co., Ltd.
- Zhang Xiqing
- E21 - EARTH DRILLING MINING