| http://www.w3.org/ns/prov#value | - The above-mentioned porous member 12 is a ring-shaped porous member with a filter shape having communicating bubbles formed by plastics or ceramics, and those having a pore size to allow only the plating solution such as a plating solution to pass there through, but not to allow fine particles to do and conductive fine particles are adopted; and a construction may be adopted in which a filter shee
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