B21D 39/044
Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating ; Tube expanders of tubes with tubes; of tubes with rods {perpendicular}
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B21D 39/044
Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating ; Tube expanders of tubes with tubes; of tubes with rods {perpendicular}
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