| 英文名称: | | 3-propanediol, 2,2-bis(bromomethyl)- polymer with alpha-hydro- omega -hydrox | | ypoly[oxy(methyl-1,2-ethanediyl)] and 1,1'-methylenebis[4-isocyanatobenzene] | | 1,3-propanediol, 2,2-bis(bromomethyl)-, polymer withalpha-hydro- omega -hydroxypoly[oxy(methyl-1,2-ethanediyl)] and |
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