Cov pas tso tsheb fiberglass rwb thaiv tsev tau tsim tshwj xeeb los ua kom qhov ntsuas kub ntawm tus kwv tij tsis tu ncua. Cov ntaub ntawv rwb thaiv tsev yog PU, ua npuas dej, thiab lwm yam. Thaum tom qab kev rwb thaiv tsev, thov fiberglass lossis lwm yam khoom haum los npog thiab tiv thaiv cov rwb thaiv tsev.
Loj: DN500mm - DN25000mm los yog raws li ib tus neeg yuav khoom qhov ntau thiab tsawg