| http://www.w3.org/ns/prov#value | - An electrostatic precipitator according to claim 1, wherein rectangular frames with four beams are provided, and in which said wires are clamped, each said frame including a column of said wires perpendicularly to the longitudinal extension of said sheets, and wherein for each said wire a through hole is drilled in opposite beams of a said frame, and the column of wires is formed by a single line
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