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FR810988D1935-12-201935-12-20Dispositif de fermeture des orifices d'admission ou d'évacuation de fluides ou de gaz avec réglage automatique du débit
ExpiredFR810988A
(fr)
Dispositif de raccordement permettant d'établir ou d'interrompre à volonté, de l'extérieur, l'écoulement d'un fluide liquide ou gazeux