DIN EN 62321-7-1 (2012-01)被替代
Determination Of Certain Substances In Electrotechnical Products - Part 7-1: Determination Of The Presence Of Hexavalent Chromium (cr(6)) In Colourless And Coloured Corrosion-protected Coatings On Metals By The Colourimetric Method (iec 111/211/cd:2011)
出版：Verband Deutscher Elektrotechniker
專家解讀視頻
