73123220
Apr 18, 1977
Feb 13, 1979
SELF-LUBRICATING COMPONENTS AND MATERIALS FOR MECHANICAL AND ELECTRICAL APPLICATIONS-NAMELY, MECHANICAL BUSHINGS, BEARINGS, SEAL RINGS, PACKING RINGS, GUIDE RINGS, PISTON RINGS, VANES, END PLATES, VALVE PARTS, PISTONS, CYLINDERS, SLIDES, FRICTION SEGMENTS, PUMP IMPELLERS, SAW GUIDES, AND ELECTRICAL BRUSHES
Machinery