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Quern-stone
Quern-stones are stone tools for hand-grinding a wide variety of materials. They were used in pairs. The lower, stationary, stone is called a quern, while the upper mobile stone is called a handstone. They were first used in the Neolithic to grind cereals into flour.〔(British Museum: The oldest known tool for making flour found in the Middle East )〕 ==Uses of quern-stones==
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「Quern-stone」の詳細全文を読む
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