婷婷六月丁香缴 清-人人爽在线-新久草视频-人人澡人人澡人人看添-国产一区二区三区四区五区密私-日日av色欲香天天综合网-激情综合婷婷丁香五月情-性高朝大尺度少妇大屁股-日本三级成本人网站-992tv成人国产福利在线观看-久章草影院-狠狠综合久久av-岛国免费的毛片-亚洲一区免费-女同舌吻互慰一区二区-国产午夜在线-国产精品超清白人精品av-狠狠综合久久久久尤物-国产亚洲精品自拍-久久草av

??????? ???????

??. ??? ???
I ????? ????? ??????? ????? ?????? ??????? 1 ??? ?????
2 ????? ??????? ??????
3 ???? ?????? ????? ??????
II ?????? ?????????? ??? ??????? 1 ????
2 ?????? ?????? ? PVC
III ?????? ?????????? ??????? 1 ????? ?????? ??????? ???????? ????? ??????? ???????
??? ???????
?????????
???????
Aniline ? MDI ? ?????? ??????
2 ????????? ????????? ?????????
?????? ??????? ???? ????????
3 ?????????? ????????? ?????? ???????? (PP)
????? ?????????? (PO) ? polyols polyels
4 ????? ????????
5 ?????????
6 PTA
7 ??????? ??? ??? ??? ?????
8 ???? ?????????
IV ???? ??????? ???????? 1 ????????? ??????? ???? ???? (PA)
?????? ??????? (PC)
polybutylene terephthalate (PBT)
(????????????/???????/???????) ???????? (ABS)
2 ????? ???????
3 ?????? ??????
4 ??????????
V ???? ????? 1 polysilicon
VI ????? ????? ????? 1 ????? ??? ??????
2 ????? ??? ????????
3 ????? ??? ????????? ??????
4 ????? ??? ????? ???????
5 ????? ??? ????????? (????? ????? ??????)