| http://www.w3.org/ns/prov#value | - g including four walls joined at corners of the tapered housing portion and converging together toward the lower end thereof, a housing skirt joined to the lower end of said tapered housing portion, said housing skirt being formed of four walls joined perpendicularly at corners, said four skirt Walls including two pairs of parallel walls, cross-sections of said housing skirt being rectangles, said
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