INTERNATIONAL PATENT: CHINA RAILWAY SEVENTH GROUP SECOND ENGINEERING CO., LTD., 中铁七局集团第二工程有限公司, CHINA RAILWAY SEVENTH GROUP WUHAN ENGINEERING CO., LTD., 中铁七局集团武汉工程有限公司, CHINA RAILWAY NORTHEAST INVESTMENT DEVELOPMENT CO., LTD., 中铁东北投资发展有限公司 FILES APPLICATION FOR "OPEN-WEB STEEL-REINFORCED CONCRETE PIER COLUMN AND BEAM CONNECTION STRUCTURE AND CONSTRUCTION PROCESS"

GENEVA, June 9 -- CHINA RAILWAY SEVENTH GROUP SECOND ENGINEERING CO., LTD. (409-5 (1-2-2) Shengli South Street, Heping DistrictShenyang, Liaoning 110166), 中铁七局集团第二工程有限公司 (中国辽宁省沈阳市和平区胜利南街409-5号（1-2-2）), CHINA RAILWAY SEVENTH GROUP WUHAN ENGINEERING CO., LTD. (No. 6 Daqiao Road, Daqiao New Area, Jiangxia DistrictWuhan, Hubei 430212), 中铁七局集团武汉工程有限公司 (中国湖北省武汉市江ࣧ...