Preparation and casting moulding performance of expanding methyl methacrylate - styrene copolymer 苯乙烯共聚物的制备及铸模性能
1 box shell : made of abs plastic acrylonitrile - butadiene - styrene copolymer , and has good painting . 2 box pedestal : its design is available to almost all motorcycles 大奔尾箱是美宇人继大绵羊后自主研发设计的又一力作,现已获国家外观设计专利。