Original standard IEC 60231G-1977 in PDF full version. Additional info + preview on request
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Original standard IEC 60233-1974 in PDF full version. Additional info + preview on request
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Original standard IEC 60233-1974 amd1-1988 in PDF full version. Additional info + preview on request
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Original standard IEC 60235-1-1972 in PDF full version. Additional info + preview on request
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Original standard IEC 60235-1A-1975 in PDF full version. Additional info + preview on request
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Original standard IEC 60235-2-1972 in PDF full version. Additional info + preview on request
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