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1989-07-04
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Continuous percolation apparatus
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1987-01-06
Rotatable disc filter
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Rotary grinding mill
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Separator and method
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Process and apparatus for separating substances from liquids
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1930-04-01
Agitation and settling process
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1985-08-06
Method and apparatus for fluid filtration including particle precipitation
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Apparatus for the separation of finely-divided solids from liquids