DONG HAE is a company that can design, manufacture and install every kind of steel plant. Our major product is cut to length line, slitting line, continuous color coating line, continuous galvanizing line and tube mill line. We have established in 1987. We can give a solution to customer who wants to reduce cost of production by using new automatic production line or rebuild the old line. We are Vendor Company of Posco and Hyundai steel in South Korea. The quality control of purchasing system ...