| 摘要 |
The non-return device consists of an assembly 1 forming a conventional siphon and comprising: The upper body 2. The fluid inlet channel 3. The waste water retention tank 4. The outlet channel 5. The method consists in using a floating body 6 placed at the base of the inlet channel 3. The leakproofness between the floating body 6 and the inlet channel 3 is provided by an attached ring or a flange 7. The floating body 6 moves in the waste fluid volume 8. <IMAGE>
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