Project for redesign engineering
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Include the source of this other project as well: <a target="_blank" rel="nofollow noreferrer noopener" class="external free" href="https://en.oho.wiki/wiki/Build_a_slow-speed_windmill_yourself_-_Part_1">https://en.oho.wiki/wiki/Build_a_slow-speed_windmill_yourself_-_Part_1</a>