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Improved process for treating lithographic plates prior to and during printing
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1956-01-31
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1931-12-08
Coating of iron, steel, zinc or the like with an organic salt of the metal
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1929-06-06
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1934-02-10
Verfahren zur Herstellung eines Basisstoffes für Metallputzmittel.
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1982-06-08
Formation of opaque white film on aluminum
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1975-09-30
Способ сн ти налета с материалов, оксидированных в отсутствии щелочей
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1925-02-10
Verfahren zur Gewinnung von Chromalaun.
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Process for the manufacture of iron-leather
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1912-12-30
Eisengerbverfahren
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Verfahren zur Abscheidung von hydroxylirten organischen Körpern aus wässrigen Lösungen
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1929-07-31
Способ дублени голь