STB PDF
Original standard VDI 3491 Blatt-2 1980-07 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-2 2017-01 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-2 E 2015-05 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-3 1980-11 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-3 2018-03 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-4 1980-12 in PDF full version. Additional info + preview on request
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