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GB/T 5686.2-1985 Methods for chemical analysis of silicomanganese alloy-The gravimetric method for the determination of silicon content (USD) via email in 1-3 business day ABOLISHED
GB/T 34195-2017 Guides for energy efficiency assessment of sintering process (USD) via email in 1-3 business day VALID
GB/T 4183-1984 Molybdenum tungsten alloy wires (USD) via email in 1-3 business day ABOLISHED
GB/T 4324.30-1984 Methods for chemical analysis of tungsten;The gravimetric method for the determination of loss content on ignition (USD) via email in 1-3 business day ABOLISHED
GB 223.53-1987 Methods for chemical analysis of iron,steel and alloy; The flame atomic absorption spectrophotometric method for the determination of copper content (USD) via email in 1-3 business day VALID
GB 4325.11-1984 Methods for chemical analysis of molybdenum;The chromazurol S photometric method for the determination of aluminum content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.60-1997 Methods for chemical analysis of iron,steel and alloy The perchloric acid dehydration gravimetric method for the determination of silicon content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB 8654.6-1988 Methods for chemical analysis of manganese metal; The diamine hydrochloride-iodo-metric method for the determination of selenium content (USD) via email in 1-3 business day VALID
GB/T 4324.18-1984 Methods for chemical analysis of tungsten;The atomic absorption spectrophotometric method for the determination of potassium content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.45-1994 Methods for chemical analysis of iron, steel and alloy The cupral separation-xylidyl blue Ⅱphotometric method for the determination of magnesium content via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 4324.10-1984 Methods for chemical analysis of tungsten;The neocuproine photometric method for the determination of copper content (USD) via email in 1-3 business day ABOLISHED
GB/T 4325.6-1984 Methods for chemical analysis of molybdenum;The ortho-phenanthroline photometric method for the determination of iron content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.11-1991 Methods for chemical analysis of iron,steel and alloy The ammonium persulfate oxidation volumetric method for the determination of chromium content via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 223.12-1991 Methods for chemical analysis of iron, steel and alloy The sodium carbonate separation-diphenyl carbazide photometric method for the determination of chromium content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 4324.3-1984 Methods for chemical analysis of tungsten;The polyethylene glycol octyl phenyl ether-phenylfluorone photometric method for the determination of tin content (USD) via email in 1-3 business day ABOLISHED
GB 8654.1-1988 Methods for chemical analysis of manganese metal; The ortho-phenanthroline photometric method for the determination of iron content (USD) via email in 1-3 business day ABOLISHED
GB 8654.4-1988 Methods for chemical analysis of manganese metal; The perchloric acid dehydration gravimetric method for the determination of silicon content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.43-1994 Methods for chemical analysis of iron,steel and alloy Determination of tungsten content via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 8704.5-1994 Methods for chemical analysis of ferrovanadium-The potentiometric method for the determination of vanadium content (USD) via email in 1-3 business day ABOLISHED
GB 223.46-1989 Methods for chemical analysis of iron, steel and alloy The flame atomic absorption spectrometric methods for the determination of magnesium content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
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