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Application filed by Siemens AgfiledCriticalSiemens Ag
Application grantedgrantedCritical
Publication of AT57760BpublicationCriticalpatent/AT57760B/en
AT57760D1912-02-141912-02-14
Ring-shaped boiling kettle with walls heated by induction currents for evaporating and melting chemical products.
AT57760B
(en)