高品质n-甲基咪唑 / cas 616-47-7 / 1-甲基咪唑 概述: 甲基咪唑是一种分子式为c4h6n2...
高品质n-甲基咪唑 / cas 616-47-7 / 1-甲基咪唑 概述: 甲基咪唑是一种分子式为c4h6n2...
delayed catalyst 1028/delayed catalyst catalyst 1028 pr...
catalyst 1028/polyurethane catalyst 1028 catalyst 1028 ...
dabco 1027/foaming retarder catalyst 1027 product physi...
delay catalyst 1027/foaming retarder 1027 catalyst 1027...