Description: 494 imperforate bowl: centrifugal separators / 494 imperforate bowl: centrifugal separators/(43) rotatable bowl (67) including structure located within vertically-oriented bowl and extending outwardly from central region (e.g., axis) thereof (68) comprising plurality of elements, each concentrically encircling axis of bowl and spaced therealong (70) each extending away from region with significant downward, as well as significant outward, component (e.g., nested cones) (73) and one or more elements having surface displaying three-dimensional configuration
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