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Grandpa Amu creates a wooden arch bridgeno nailsvery powerful craftsman
The wooden arch bridge, an ancient Chinese mortise and tenon technique, is characterized by no glue and no nails. the structure is very strong. grandpa A Mu finally finished it, with the help of the photographer, who is also grandpa A Mu's son. with the new bridge, the small garden is more beautiful.
![making the strongest 3way leg jonery / castle joint [woodworking]](https://i.ytimg.com/vi/OJ8V_rzwxh0/mqdefault.jpg)
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