INTERNATIONAL PATENT: CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CNPC OFFSHORE ENGINEERING COMPANY LIMITED, 中国石油集团海洋工程有限公司, CNPC ENGINEERING TECHNOLOGY RESEARCH COMPANY LIMITED, 中国石油集团工程技术研究有限公司 FILES APPLICATION FOR "ANTICORROSIVE OIL AND ANTICORROSIVE MATERIAL AND PREPARATION METHODS THEREFOR AND USE THEREOF"

GENEVA, May 17 -- CHINA NATIONAL PETROLEUM CORPORATION (9 Dongzhimen North Street,Dongcheng 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 OFFSHORE ENGINEERING COMPANY LIMITED (3rd Floor, Zone C, Building 3, No. 16 Hongda North Road, Beijing Economic and Technological Development Zone,Daxing District, Beijing 100176), 中国石油集团海洋工程有限公司 (中国北京市大兴区北京经济ü...