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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| HG/T 21557.3-2006 |
Plastic Cascade ring packing 塑料阶梯环填料 |
China Chemical Industry
Standards Cascade ring packing |
 English PDF |
| HG/T 21557.2-1995 |
Cascade ring packing 不锈钢阶梯环填料 |
China Chemical Industry
Standards Cascade ring packing |
English PDF |
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