Adresa: 817 Haeun, Donghung-dong, Središnji okrug, Pjongjang, DNRK
Ryonha Machine Tool, Ryonha Machine Tool Corporation, Ryonha Machinery Corp, Ryonhwa Machinery Joint Venture Corporation, Ryonhwa Machinery JV, Huichon Ryonha Machinery General Plant, Unsan, Unsan Solid Tools, Millim Technology Company