| http://www.w3.org/ns/prov#value | - The negative pressure causes the ozone-containing cleaning air to flow into the restrictive flow passage 77 from the buffer chamber 75 through the air intake hole 80, whereby the cleaning air is mixed in the form of minute air bubbles with the flowing water.There is a possibility that, when the water flow in the restrictive flow passage 77 is stopped, the water would flow into the buffer chamber 7
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