means connecting said cover member, said intermediate member means, and said base member together, whereby when oil to be filtered is supplied to said inlet opening, the oil is distributed across said cover member planar inner surface via the radial and circular grooves thereof, passes successively through said filter subchambers and said filter means arranged therein via said throughslots contained in said intermediate member means, and is discharged from said outlet opening via {HEAD ~ the circular and radial grooves} contained in {TAIL ~ said base member planar inner surface} 
means connecting said cover member , said intermediate member means , and said base member together , whereby when oil to be filtered is supplied to said inlet opening , the oil is distributed across said cover member planar inner surface via the radial and circular grooves thereof , passes successively through said filter subchambers and said filter means arranged therein via said throughslots contained in said intermediate member means , and is discharged from said outlet opening via { HEAD ~ the circular and radial grooves } contained in { TAIL ~ said base member planar inner surface }
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