GB - Chinese national standards

Water quality--Determination of aniline compounds--Spectrophotometric method with N-(1-naphthyl) ethy lenediamine

Available languages: English, Chinese

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Water quality--Determination of Kjeldahl nitrogen

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Water quality--Determination of permanganate index

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Water quality--Determination of total phosphorus--Ammonium molybdate spectrophotometric method

Available languages: English, Chinese

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Water quality--Determination of benzo(a)-pyrene--Acetylated paper chromatography with fluorescence spectrophotometric method

Available languages: English, Chinese

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Water quality--Determination of chloride--Silver nitrate titration method

Available languages: English, Chinese

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Water quality--Determination of sulfate--Gravimetric method

Available languages: English, Chinese

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C-Si photovoltaic(PV) modules—Light and elevated temperature induced degradation (LETID) test—Detection

Available languages: English, Chinese

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Parallel pinsof unhardened steel and austenitic stainless steel

Available languages: English, Chinese

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Parallel pinsof hardened steel and martensitic stainless steel(Dowel pins)

Available languages: English, Chinese

Available design: electronic design (pdf), Print design