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| U-polyvinyl chloride; U-PVC | |||
| unplasticized poly (vinyl chloride) | |||
| unplasticized polyvinyl chloride; unplasticized PVC | |||
| 未 增塑聚氯乙烯: 3 phrases in 3 subjects |
| Chemistry | 1 |
| Polymers | 1 |
| Water resources | 1 |
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