China Determination of 21 GB Standards Search Result |
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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 - 中英文版 |
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GB/T 4215-1984 Determination of sound power levels of noise emitted by metal cutting machine tools 金属切削机床噪声声功率级的测定 - 中英文版 |
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