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Application filed by R G G LejeunefiledCriticalR G G Lejeune
Priority to BE515948ApriorityCriticalpatent/BE515948A/fr
Publication of BE515948ApublicationCriticalpatent/BE515948A/fr
Συστημα αυξησεως της θερμαινομενης επιφανειας τωνλεβητων κεντρικης θερμανσεως δια της διελευσεως των καυσαεριων εκ των νεκρων εξωτερικων επιφανειων του λεβητος.