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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 18477.1-2007 |
Unplasticized polyvinyl chloride (PVC-U) structure wall pipline system for underground soil waste and drainage - Part 1: double wall corrugated pipes 埋地排水用硬聚氯乙烯(PVC-U)结构壁管道系统 第1部分：双壁波纹管材 |
China National Standards pipline |
 English PDF |
| GB/T 4791-2005 |
Graphical symbols for pipline accessory of ships 船舶管路附件图形符号 |
China National Standards pipline |
English PDF |
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