| 英文名称: | | 2-oxepanone, polymer with 1,4-butanediol, alpha-hydro- omega -hydroxypoly[oxy(m | | ethyl-1,2-ethanediyl)] and 1,1'-methylenebis[4-isocyanatobenzene] | | 2-oxepanone, polymer with 1,4-butanediol, alpha-hydro-omega -hydroxypoly[oxy(methyl-1,2-ethanediyl)] and |
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