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Original standard IEC TR 61931-1998 in PDF full version. Additional info + preview on request

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Original standard IEC TR 61940-1998 in PDF full version. Additional info + preview on request

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Original standard IEC TR 61946-2007 in PDF full version. Additional info + preview on request

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Original standard IEC TR 61948-1-2016 in PDF full version. Additional info + preview on request

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Original standard IEC TR 61948-2-2019 in PDF full version. Additional info + preview on request

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Original standard IEC TR 61948-3-2018 in PDF full version. Additional info + preview on request

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