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Hand steel Hand steel is a mining term that applies to the use of a chisel-like tool. The chisel is struck violently with a striking tool, usually with a sledgehammer. It is one of the several mining techniques used in traditional mining and one of the several with the use of basic hand tools. Hand steel was used in the 19th and 20th centuries for surface and underground mining.〔(Shernrooke Village and A Gold Mining Exhibit )〕 ==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Hand steel」の詳細全文を読む
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