Supply PVC air duct flange and accessories for HVAC duct fitting. PIR panel for ducting, aluminium composite panel, pir panel, pu panel for ducting, spray polyurethane foam, spray foam, rigid foam, ....
Yuansen Group was established in 2004; we are one of leading business conglomerate in China, with comprising two industrial companies serve to the construction and home industries. duct & insulation....