“PVC—U给水管”概念、定义、翻译-科学时代

单词	PVC—U给水管
释义	请查阅硬聚氯乙烯--PVC—U给水管
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科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。