STB PDF
Original standard VDI VDE 2420 Blatt-4 1981-03 in PDF full version. Additional info + preview on request
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Original standard VDI VDE 2420 Blatt-5 1980-05 in PDF full version. Additional info + preview on request
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Original standard VDI VDE 2420 Blatt-6 1981-03 in PDF full version. Additional info + preview on request
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Original standard VDI VDE 2420 Blatt-7 1980-05 in PDF full version. Additional info + preview on request
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Original standard VDI VDE 2420 Blatt-8 1980-05 in PDF full version. Additional info + preview on request
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Original standard VDI VDE 2421 1980-02 in PDF full version. Additional info + preview on request
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