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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 1239.3-2009 |
Cold coiled helical springs technical specifiations - Part 3: Torsion spring 冷卷圆柱螺旋弹簧技术条件 第3部分：扭转弹簧 |
China National Standards specifiations |
 English PDF |
| GB/T 3402.1-2005 |
Plastics Homopolymer and copolymer resins of vinyl chloride -- Part 1: Designation system and basis for specifiations 塑料 氯乙烯均聚和共聚树脂 第1部分：命名体系和规范基础 |
China National Standards specifiations |
English PDF |
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