72105050
Sep 23, 1960
Jun 13, 1961
Mechanical Seals, Heat Exchanger Coils for Mechanical Seals, Lapping Machines for Finishing Seal Faces to an Optical Flat, Apparatus for Testing Optical Flats Used in Lapping Mechanical Seal Faces to a Desired Finish and Parts Thereof for Replacement and Repair on Mechanical Seals
Yarns and Threads