73445135
Sep 23, 1983
Apr 2, 1985
Hot Pressed Ceramics Such as Silicon Nitride, Silicon Carbide, Boron Carbide, Beryllium Oxide, Aluminum Oxide, Thorium Oxide, Titanium Diboride Used in Such Products as Hot Pressing Dies, Microwave Absorbing Ceramics, Nuclear Ceramics, Ceramic Tooling, Metallurgical Refractories, Gas Bearings, Armor and Ceramic Turbine Components and Other Technical Ceramic Products
Chemicals