| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | See Detail | Status | Related Standard |
| GB/T 4921-1985 | English | 159 |
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Waste gas from manufacturing process. Determination of chemical oxygendemand and nitrogen oxide. Potassium dichromate oxidation and naphthylethylene diamine colorimetric method
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GB/T 4921-1985
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GB/T 4921-1985
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