Hais txog tuam txhab
20 xyoo tsom rau kev tsim thiab muag cov vuas hauv pem teb
Hongyuan Waterproof tau tsim muaj nyob rau hauv 1996 thiab tam sim no txhim kho mus rau hauv ib tug kws waterproof systems muab kev koom ua ke R & D, ntau lawm thiab muag khoom thiab kev tsim kho pab raws li ib tug sib dhos lub tsev kev lag luam puag thiab ib tug thawj coj ntawm Tuam Tshoj waterproof kev lag luam.