GENEVA, Dec. 8 -- YANKUANG ENERGY GROUP COMPANY LIMITED (No.949, Fushan South Road, ZouchengJining, Shandong 273500), 兖矿能源集团股份有限公司 (中国山东省济宁市邹城市凫山南路949号), CHINA UNIVERSITY OF MINING AND TECHNOLOGY (No.1, Daxue Road, TongshanXuzhou, Jiangsu 221116), 中国矿业大学 (中国江苏省徐州市铜山区大学路1号) filed a patent application (PCT/CN2025/100630) for "METHOD FOR IDENTIFYING ROTATION FLEXIBILITY OF CIRCULAR BALANCE ROPE IN MINE SHAF...