PSM V10 D029 Ancient fire making methods.jpg
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発火犂（左)、錐もみ式発火法(右)
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PSM V10 D029 Ancient fire making methods, Fire-starting, Popular Science Monthly illustrations/Volume 10, Images with extracted images
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PSM V10 D029 Ancient fire making methods, Ancient fire making methods, A fire plough (left), as opposed to a hand drill (right)., A fire plough (left), as opposed to a hand drill (right)
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Ebisu , a drill-type fire-eating method
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PSM V10 D029 古代発火方式、火始動方式、ポピュラーサイエンス 月刊イラスト/第10巻、抽出画像付き
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PSM V10 D029 古代火工法、古代火工法、火耕法(左) 手錐(右) ではなく、火耕(左) 手錐(右) ではなく、手錐(右)
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