| 摘要 |
The present invention concerns an adaptor device for coupling a suction nozzle to a container, preferably containing chemical products, comprising: - an at least partially elastic disc (1), provided with a through hole (2), one or more tongues (4) coupled to the disc (1) and projecting from one surface of the disc (1), the disc (1) being capable to transmit a pressure exerted onto a perimeter of the through hole (2) so that a free end of each one of said one or more tongues (4) bends towards a central portion of the disc (1).
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