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Uploaded by on Jul 13, 2010

庄三郎はさみの製造工場にて撮影。鍛造や焼入れで刃の表面に生じた不純物を取り除く研削作業で生じた削り跡をキレイに磨き上げる研磨という作業です。火花が飛び散るのは、­鋼部分を磨く時で、鉄の部分は柔らかいので火花はでないそうです。

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