Painting decorative manhole covers. This one is from the Hinode Plant in Tochigi, Japan.
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More:
https://www.nippon.com/en/views/b063...o-gallery.html
https://www.nippon.com/en/views/b063...le-covers.html
Previously:
https://www.homemadetools.net/forum/...907#post102827
https://www.homemadetools.net/forum/...734#post124027
https://www.homemadetools.net/forum/...229#post101052
https://www.homemadetools.net/forum/...737#post102333