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JB/T 9548.4-1999 Methods for chemical analysis of iron-chromium-aluminium alloys The photometric acid dehydration gravimetric mehtod for the determination of silicon content via email in 1-3 business day VALID please email coc@codeofchina.com for quotation
JB/T 7777.1-2008 Test methods for chemical analysis of silver-tin oxide-indium oxide electric contact material-Part 1:Determination of tin content (USD) via email in 1-3 business day VALID
JB/T 8443.2-1996 via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
ZB K 14003.9-1988 via email in ABOLISHED please email coc@codeofchina.com for quotation
GB/T 24268-2009 Test methods for chemical analysis of silver-tin oxide electric contact material (USD) via email in 1-3 business day VALID
JB/T 7777.2-2008 Test methods for chemical analysis of silver-tin oxide-indium oxide electric contact material-Part 2:Determination of indium (USD) via email in 1-3 business day VALID
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