| 摘要 |
In this mechanism, the two valves are arranged one below the other and comprise: - a lower valve (10) which, interacting with a seat (11) surrounding the discharge hole (1), is integral with the tubular body (3) arranged above it and is joined to the complete discharge control (28), - and an upper valve (20) which, interacting with a seat (22) formed on the upper edge of the tubular body (3), is joined to the partial discharge control (21). <IMAGE>
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