uPVC
noun [ U ] uk/ˌjuː.piːviːˈsiː/ us/ˌjuː.piːviːˈsiː/
硬聚氯乙烯（unplasticized polyvinyl chloride 的缩写）
abbreviation for unplasticized polyvinyl chloride: a hard form of PVC (= a type of plastic), used especially for making pipes and window frames
We recommend uPVC window frames because they are virtually maintenance-free. 我们推荐uPVC窗框，因为它们几乎不需要任何维护。