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Surface treating method and device thereof

详细技术说明: In a conventional surface treating techniqueusing a suction cavitation current, flowing condition of fluid is not stabilized and suction cavitation currents flow in almostparallel along a surface to be treated when a wide chamber isused to place matter to be treated therein, therefore crushing impact ofcavitation bubbles cannot sufficiently be acted on the surfaceto be treated.[MEANS FOR SOLVING PROBLEMS] A fluid suction flow path(26) communicating with a fluid supply flow path (25) only via a restriction(27) is provided so as to encircle almost concentrically the fluid supply flowpath (25) having at one end thereof the restriction(27) and working fluid (8) in the fluid suctionflow path (26) is sucked with a sucking means (17) to therebygenerate the suction cavitation flow (5) in a flow directly below therestriction (27) and allow the suction cavitation flow (5) to collide almostvertically against the surface to be treated(6a), whereby the surface to betreated (6a) is surface treated.

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