INTERNATIONAL PATENT: GUANGZHOU METRO GROUP CO., LTD., 广州地铁集团有限公司, CHINA RAILWAY CONSTRUCTION SOUTH CHINA CONSTRUCTION CO., LTD., 中铁建华南建设有限公司, GUANGZHOU METRO CONSTRUCTION MANAGEMENT CO., LTD., 广州地铁建设管理有限公司 FILES APPLICATION FOR "COMBINED EXCAVATION METHOD FOR SHAFT IN SOFT-OVER-HARD COMPOSITE STRATA"

GENEVA, Oct. 26 -- GUANGZHOU METRO GROUP CO., LTD. (Building A, Wansheng Plaza, No. 1238 Xingang East Road, Haizhu DistrictGuangzhou, Guangdong 510330), 广州地铁集团有限公司 (中国广东省广州市海珠区新港东路1238号万胜广场A座), CHINA RAILWAY CONSTRUCTION SOUTH CHINA CONSTRUCTION CO., LTD. (No.1 Nanfu Road, Huangge Town, Nansha DistrictGuangzhou, Guangdong 511458), 中铁建华南建设有限公司 (中国广东省广州市南沙区黄阁໭...