Striking with the hammer on metal parts

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http://timemaps.net/timemap/videos/striking_with_the_hammer_on_metal_parts.mp4
http://timemaps.net/timemap/videos/striking_with_the_hammer_on_metal_parts.webm
http://timemaps.net/timemap/videos/striking_with_the_hammer_on_metal_parts.ogv