| http://www.w3.org/ns/prov#value | - A centrifugal filtering machine including a casing, means within the casing forming a chamber provided with a bottom having an outlet, a solid inner wall upstanding from said bottom, an outer foraminous wall upstanding from said bottom, said foraminous wall being spaced from said casing and said inner wall and acting as an inlet to the space' be'tween said inner and outer walls, said outlet from t
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