| 摘要 |
placing a fluorescent lamp(2) about the pressed metal body such that the lamp is placed relative to a depressed metal plate(4) of the body and opposed to a flattering worker to form a reflection on the depressed part of the plate(4). It includes placing a flattening instrument having a sharpened and bent tip and a handle both ends of it under the depressed metal plate(4) such that the tip is placed under a depressed part of the metal plate(4). It involves precisely placing the tip of the instrument under the center of the depressed part of the metal plate(4) using difference between light and shade of a reflection reflected on the metal plate(4) about the depressed part by light of the lamp(2). It then repeatedly, rapidly, slightly and elastically with a point of action until the depressed part(4) is repeatedly levered up and completely flattened by repeated leverage of the instrument about the point of action.
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