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SN/T 1789-2006 Determination of gold and silver contents of blister copper--Fire assay gravimetric method (USD) via email in 1-3 business day VALID
GB/T 5121.24-2008 Methods for chemical analysis of copper and copper alloys—Part 24:Determination of selenium and tellurium content (USD) via email in 1-3 business day VALID
YS/T 910-2013 Determination of copper content for brass— Iodimetry (USD) via email in 1-3 business day VALID
GB/T 5121.21-1996 Copper and copper alloys-Determination of titanium content (USD) via email in 1-3 business day ABOLISHED
GB/T 19447-2004 The copper and copper-alloy seamless tubes with integral fins for heat exchanger via email in 1-3 business day ABOLISHED please email coc@codeofchina.com for quotation
GB/T 5120.2-1995 Methods for chemical analysis of blister copper-Determination of arsenic content (USD) via email in 1-3 business day ABOLISHED
GB/T 4428-1984 Leaded brass bar for making needle seat of syringe via email in ABOLISHED please email coc@codeofchina.com for quotation
YS/T 922-2013 Methods for Chemical Analysis of High Purity Copper Determination of Trace Impurity Elements Content Glow Discharge Mass Spectrometry (USD) via email in 1 business day VALID
YS/T 465-2003 Defects of casting products of copper and copper alloy (USD) via email in 1-3 business day VALID
GB/T 5121.7-1996 Copper and copper alloys-Determination of arsenic content (USD) via email in 1-3 business day ABOLISHED
YS/T 631-2007 Methods for analysis of zinc-the optical emission spectrometry via email in 1-3 business day please email coc@codeofchina.com for quotation
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