国内精品国产三级国产在线专_欧美日韩在线播放一区二区_成人xxxx视频_欧美激情视频一区_色女人综合av_久久久亚洲影院_久久久久久九九_成人免费网站在线_日韩美女毛茸茸_狠狠干一区二区

Current Location :> Home > Books > Text
一種高韌性聚苯乙烯合金及制備工藝
inventor/creator:方征平, 查琳琳, 馬國維, 許承威
Paten number/application number:ZL 02 1 37587.9
application/authorized announcemen date:2004.11.24
brief introduction:

一種高韌性聚苯乙烯合金及制備工藝