INTERNATIONAL PATENT: CHINA PETROLEUM PIPELINE ENGINEERING CO., LTD, 中国石油管道局工程有限公司, CHINA NATIONAL PETROLEUM CORPORATION, 中国石油天然气集团有限公司, CHINA PETROLEUM PIPELINE TELECOM & ELECTRICITY ENGINEERING CO., LTD, 中国石油天然气管道通信电力工程有限公司, CHINA PETROLEUM PIPELINE ENGINEERING CORPORATION (ENGINEERING), 中国石油天然气管道工程有限公司 FILES APPLICATION FOR "METHOD AND APPARATUS FOR DETECTING GROUND SURFACE POSITION OF OPTICAL FIBER SPLICING POINT, DEVICE AND STORAGE MEDIUM"

GENEVA, March 30 -- CHINA PETROLEUM PIPELINE ENGINEERING CO., LTD (No. 87, Guangyang Road, Guangyang DistrictLangfang, Hebei 065000), 中国石油管道局工程有限公司 (中国河北省廊坊市广阳区广阳道87号), 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), CHINA PETROLEUM PIPELINE TELECOM & ELECTRICITY ENGINEER...