abbr.
1.copolymer of vinylidene fluoride and tetrafluoroethylene 亚乙烯氟四氟乙烯共聚物(科技符号)2.copolymer of vinylidene fluoride and trifluoroethylene 亚乙烯氟-三氟乙烯共聚物(科技符号)3.polycrystalline silicon,polysilicon 多晶硅4.polyethylene 聚乙烯5.polymer 聚合物,聚合体6.polytechnic (传授)多种工艺的；工业学校7.polytechnical 工艺的