DMH UNITED STEEL INDUSTRY CO.,LTD(USI Group) is one of the largest steel pipe groups in China. Established in1989,headquartered in Suzhou City,Jiangsu Province.USI group has 20 branch companies,total
YanTai LongHai Hoisting Equipment Co.,Ltd,located in the ETDC of Yantai,Shandong Province of the People's Republic of China,has calculated 20 years experiences of
manufacturing lifting tools.
