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Original standard VDI 3491 Blatt-12 1990-01 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-13 1996-06 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-13 E 1988-02 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-14 E 1988-12 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-15 1996-12 in PDF full version. Additional info + preview on request
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Original standard VDI 3491 Blatt-16 1996-11 in PDF full version. Additional info + preview on request
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