Industrial large ice block making - I think?
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Previously:
https://www.homemadetools.net/forum/...748#post129031
https://www.homemadetools.net/forum/...471#post122631
https://www.homemadetools.net/forum/...945#post124948
https://www.homemadetools.net/forum/...406#post127278
https://www.homemadetools.net/forum/...3589#post78335