子彈科技演進

子彈科技演進 (上)

http://www.youtube.com/watch?v=EhX8g5ugIgw&feature=related

子彈科技演進 (中)

http://www.youtube.com/watch?v=z4MUMrRdweA&feature=related

子彈科技演進 (下)

http://www.youtube.com/watch?v=dK-7Nd9KNSI&feature=related

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