| 摘要 |
A one-way extra-flat degassing valve (4) for airtight containers (1) comprises: a base body or plate (5) with a first hole (52) with a smaller diameter for passage of the gases and a second hole (53) with a larger diameter for expansion of the gases; a cap (6) provided with an outlet hole (65) for discharge of gas designed to be coupled to the base body (5), and a mobile diaphragm (7) interposed between the base body (5) and the cap (6) to open/shut off the passage of gas from the second expansion hole (53) to the outlet hole (65).
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