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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 4921-1985 |
Waste gasfrom manufacturing process--Determination of chemical oxygendemand and nitrogenoxide--Potassium dichromate oxidation and naphthylethylene diamine colorimetric method 工业废气 耗氧值和氧化氮的测定 重铬酸钾氧化、萘乙二胺比色法 |
China National Standards nitrogenoxide |
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