| 摘要 |
PROBLEM TO BE SOLVED: To provide a water jet nozzle device capable of preventing water, for instance, containing unwanted bacteria from flowing back and preventing contamination inside the device, the contamination of a water supply source and clogging, etc. SOLUTION: In this water jet nozzle device for jetting supplied water through a nozzle, by interposing a non-return means, back flow from a nozzle side at the time of not supplying the water is prevented.
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