狠狠色丁香久久综合婷婷亚洲成人福利在线-欧美日韩在线观看免费-国产99久久久久久免费看-国产欧美在线一区二区三区-欧美精品一区二区三区免费观看-国内精品99亚洲免费高清

 貨號          中文名                                                                 英文名                                                             包裝

33427   甲苯-2.4-二異氰酸酯                      2.4-TDI 2.4-Diisocyanatotoluene                                       5ml

33493   甲苯-2.6-二異氰酸酯                      2.6-TDI 2-Methyi-m-mphenylen diisocyanate                  100mg

33428   二苯甲烷二異氰酸酯                       4.4’-MDI 4.4’-Methylene bis（pheny isocyanate）               100mg

33490   二環(huán)己基甲烷二異氰酸酯        HMDI 4.4’-Diisocyanato-methylene dicyclohexane   2ml