| 英文名称: | | 1,4-butanediol, polymer with 1,4-diisocyanato-2-methylbenzene and alpha-hydro-o | | mega-hydroxy poly(oxy-1,4-butanediyl) | | polyurethane y-227 | | y 227 | | 1,4-butanediol, polymer with1,4-diisocyanato-2-methylbenzene and alpha-hydro-omega-hydroxypoly(oxy-1,4-butanediyl) |
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