Original standard IEC 60050-221-1990 in PDF full version. Additional info + preview on request
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Original standard IEC 60050-221-1990 amd1-1993 in PDF full version. Additional info + preview on request
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Original standard IEC 60050-221-1990 amd2-1999 in PDF full version. Additional info + preview on request
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Original standard IEC 60050-221-1990 amd3-2007 in PDF full version. Additional info + preview on request
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Original standard IEC 60050-221-1990 amd4-2020 in PDF full version. Additional info + preview on request
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Original standard IEC 60050-300-2001 in PDF full version. Additional info + preview on request
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