Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Escher Wyss Maschf AgfiledCriticalEscher Wyss Maschf Ag
Publication of CH59974ApublicationCriticalpatent/CH59974A/de
Perfeccionamientos en las disposiciones para el sostenimiento de las superficies filtrantes con tubos de cemento armado, destinados a la insuflación o inyección del aire comprimido.