從事2,4-二異氰酸甲苯(2,4-toluene diisocyanate;TDI)或2,6-二異氰酸甲苯(2,6-toluene diisocyanate;TDI)、4,4-二異氰酸二苯甲烷(4,4-methylene bisphenyl diisocyanate; ...
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