INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CNPC TUBULAR GOODS RESEARCH INSTITUTE, 中国石油集团工程材料研究院有限公司 FILES APPLICATION FOR "METAL ELBOW AND MANUFACTURING METHOD THEREFOR"

Posted On: 2025-03-16

GENEVA, March 16 -- CHINA NATIONAL PETROLEUM CORPORATION (9 Dongzhimen North StreetDongcheng District, Beijing 100007), 中国石油天然气集团有限公司 (中国北京市东城区东直门北大街9号), CNPC TUBULAR GOODS RESEARCH INSTITUTE (89 2nd Jinye Road, Yanta DistrictXi'an, Shaanxi 710000), 中国石油集团工程材料研究院有限公司 (中国陕西省西安市雁塔区锦业二路89号) filed a patent application (PCT/CN...

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INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CNPC TUBULAR GOODS RESEARCH INSTITUTE, 中国石油集团工程材料研究院有限公司 FILES APPLICATION FOR "METAL ELBOW AND MANUFACTURING METHOD THEREFOR"