FR678198A - Dispositif de réglage de la section transversale de passage des tuyaux dans les installations pour l'enlèvement des poussières
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Dispositif de réglage de la section transversale de passage des tuyaux dans les installations pour l'enlèvement des poussières
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A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
A47L9/0072—Mechanical means for controlling the suction or for effecting pulsating action
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FR678198D1928-08-111929-07-09Dispositif de réglage de la section transversale de passage des tuyaux dans les installations pour l'enlèvement des poussières
ExpiredFR678198A
(fr)