| http://www.w3.org/ns/prov#value | - A cleaning method of the present embodiment is a method in which a fluid flows in from one of the side surfaces directly towards a side of a cleaning target stored in a cleaning tank by being inclined, and the fluid also flows in from the other side surface on a position in the vicinity of the lower end of the cleaning target, and the fluid flowing in from at least one of the side surfaces is plur
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