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| 聚氨酯弹性体; 尿烷氨基甲酸乙酯人造橡胶弹性体 | |||
| 聚氨基甲酸乙酯弹性体 | |||
| 氨基甲酸乙酯人造橡胶 | |||
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urethane elastomer : 4 phrases in 3 subjects |
| Chemistry | 1 |
| Plastics | 1 |
| Polymers | 2 |
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