A bank of capacitors is first charged to a high voltage and then discharged across a gap between two electrodes causing explosions inside the hollow work piece which is filled with some suitable medium generally water. Whether you ve spent six decades in a sheet metal fabrication shop or you re learning the trade basics kaempf harris list of sheet metal techniques helps pros and beginners. Of metal forming operations fcutting of sheet metal is accomplished by a shearing action between two sharp cutting edges.
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