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Original standard VDI 2139 1959-08 in PDF full version. Additional info + preview on request
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Original standard VDI 2140 1958-10 in PDF full version. Additional info + preview on request
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Original standard VDI 2141 1962-03 in PDF full version. Additional info + preview on request
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Original standard VDI 2142 Blatt 2 Berichtigung 2014-07 in PDF full version. Additional info + preview on request
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Original standard VDI 2142 Blatt 3 2014-09 in PDF full version. Additional info + preview on request
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Original standard VDI 2142 Blatt-1 1994-10 in PDF full version. Additional info + preview on request
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