APPLICATION Construction of sunroof in buildings ,halls, shopping center ,stadium ,public places of entertainment and public facility. ring shield of bus stations ,garages, pergolas, corridors. Transparent shields for security forces in nursery schools airports, factories. Skylight of modern agriculture and aquacultures, indoorpools. Sign board for ads light box and exhibition service. Street name plate advertisement lamp house advertisement and exhibition disposal. APPLICATION The pp hollow cross section plate is light and high strength,moistureproof good environmental protection and refabrication performance. Can be processed into the reusable container,packing case, clapboard ,backing plate ,and culet.