Electric Sluice
From The Blockheads Wiki
The Electric Sluice
The Electric Sluice allows you to sift through gravel (created by Electric Press) for a random ore. this can be used to get gold,platinum,titanium, and other rare ores, but requires lots of manpower to keep running. It requires electricity, a steady supply of gravel from the electric press, and a blockhead manning the station.
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put these all together and it makes,
a Elecric Sulice