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(de )
1912-12-10
Verfahren und Einrichtung zum Rösten von Erzen im Schachtofen.
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1912-02-09
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DE504940C
(de )
1930-08-09
Vorrichtung zur Bestimmung des Wassergehaltes in Lebensmitteln, Kohlen usw.
DE76719C
(de )
1900-01-01
Steuerung für einkammerige Luftdruck-Wasserheber mittelst Hahn- und Schwimmergewichten
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1912-03-04
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