73243671
Dec 20, 1979
Jun 22, 1982
Lapping Compound for Smoothing or Polishing Solid Surfaces-Namely, Solid Surfaces of Naturally Hard Substances, Such as Crystals, Gemstones, and Metallographic Specimens; and Solid Surfaces of Artificially Hardened Materials, Such as Dies, Molds, and Grinding Tools
Chemicals