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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| HJ/T 252-2006 |
Specifications for environmental protection product. Middle and fine bubble diffusers 环境保护产品技术要求 中、微孔曝气器 |
China Environmental Protection Industry
Standards diffusers |
 English PDF |
| QB/T 1849-1993 |
(Double Helix beet continuous diffusers) 双螺旋甜菜连续渗出器 |
China Light Industry
Standards diffusers |
English PDF |
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