World's Sharpest Sword /A rare unique Steel clad knife-making technology in Taiwan

How to make the sharpest long tuna knife in Taiwan/Detailed video of Taiwanese homemade knife making. 來發鐵店:https://goo.gl/maps/HhWVXhz4hfZV8x1g9?entry=yt 永興鐵店:https://goo.gl/maps/tp6n4rKRYUGKmX7f6?entry=yt

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