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GB/T 223.33-1994 Methods for chemical analysis of iron, steel and alloy The chlorophosphonazo mA photometric method for the determination of cerium content after extraction separation via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
AQ 2002-2004 Safety regulations for pudding (USD) via email in 1-3 business day ABOLISHED
GB 223.19-1989 Methods for chemical analysis of iron steel and alloy; The neocuproine-chloroform extraction photometric method for the determination of copper content (USD) via email in 1-3 business day VALID
GB/T 223.32-1994 Methods for chemical analysis of iron, steel and alloy The hypophosphite reduction-iodimetric method for the determination of arsenic content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 4324.11-1984 Methods for chemical analysis of tungsten;The chromazurol S photometric method for the determination of aluminum content (USD) via email in 1-3 business day ABOLISHED
GB/T 10116-1988 Ammonium paratungstate via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB 223.66-1989 Methods for chemical analysis of iron, steel and alloy The thiocyanate-chlorpromazine hydrochloride-chloroform extraction photometric method for the determination of tungsten content (USD) via email in 1-3 business day VALID
GB/T 4324.12-1984 Methods for chemical analysis of tungsten;The chloritization-molybdenum blue photometric method for the determination of silicon content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.25-1994 Methods for chemical analysis of iron, steel and alloy.The dimethylglyoxime gravimetric method for the determination of nickel content (USD) via email in 1-3 business day VALID
GB/T 223.50-1994 Methods for chemical analysis of iron, steel and alloy The phenylfuorone-CTMAB direct photometric method for the determination of tin content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
GB/T 14165-1993 Ferrous metals-Test method of atmospheric exposure via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 4325.1-1984 Methods for chemical analysis of molybdenum;The square wave polarographic method for the successive determination of lead and cadmium content (USD) via email in 1-3 business day ABOLISHED
GB/T 4324.5-1984 Methods for chemical analysis of tungsten;The molybdenum blue photometric method for the determination of arsenic content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.40-1985 Methods for chemical analysis of iron,steel and alloy; The anion-exchange separation-sulphochlorophenol S photometric method for the determination of niobium content via email in ABOLISHED please email coc@codeofchina.com for quotation
GB/T 4324.24-1984 Methods of chemical analysis of tungsten;The beryllium as carrier precipitation agent-molybdenum blue photometric method for the determination of phosphorus content (USD) via email in 1-3 business day ABOLISHED
GB/T 16761-1997 Dimensions,shape,weight and tolerances for forged flats via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 8704.8-1994 Methods for chemical analysis of ferrovanadium. The chromazurol S photometric method and EDTA volumetric method for determination of aluminium comtent (USD) via email in 1-3 business day ABOLISHED
GB/T 5686.5-1988 Methods for chemical analysis of silicomanganese alloy; The infrared absorption method for the determination of carbon content (USD) via email in 1-3 business day ABOLISHED
GB/T 223.73-1991 Methods for chemical analysis of iron, steel and alloy The titanium trichloride-potassium dichromate volumetric method for the determiination of iron content via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 10418-1989 Steel bonded tungsten carbides--Determination of transverse rupture strength (USD) via email in 1-3 business day ABOLISHED
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