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| 柔性聚亚氨酯; 柔性聚氨基甲酸乙酯 | |||
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flexible polyurethane : 13 phrases in 7 subjects |
| Aviation | 1 |
| Ecology | 1 |
| General | 1 |
| Plastics | 4 |
| Polymers | 1 |
| Space | 2 |
| Technology | 3 |
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