11 Structural furnace parts, namely, diffusion furnace jigs used for holding wafers; electric heaters for crucibles; industrial furnaces, their replacement parts and their fittings, namely, electric heaters for commercial use, susceptors and trays; furnace replacement parts, namely, electric heaters, susceptors and crucibles, for furnaces used for growing single crystals using the pulling method for the manufacture of semiconductors; fittings for furnaces used for growing single crystals using the pulling method for the manufacture of semiconductors, namely, electric heaters and susceptors; furnace replacement parts, namely, electric heaters, susceptors and crucibles, for thermal diffusion furnaces for inducting dopant for semiconductors; fittings for thermal diffusion furnaces for inducting dopant for semiconductors, namely, electric heaters and susceptors; furnace replacement parts, namely, electric heaters, susceptors and crucibles, for furnaces for forming semiconductor thin films; fittings for furnaces for forming semiconductor thin films, namely, electric heaters and susceptors; structural parts and fittings made of carbon fiber reinforced carbon composite materials that are used in industrial furnaces, namely, furnace insulation protection covers, furnace shelves for supporting materials to be heat treated, nuts and bolts, rods, heaters, internal driving parts and die spacers all for furnaces; furnace replacement parts, namely, electric heaters, susceptors and crucibles, for furnaces for annealing treatment machines, with said furnaces being sold separately from such machines; fittings for furnaces for annealing treatment machines, namely, electric heaters and susceptors; furnace replacement parts, namely, electric heaters, susceptors and crucibles, for furnaces for crystal growth systems; fittings for furnaces for crystal growth systems, namely, electric heaters and susceptors; crucibles, namely, crucibles for conveying the material to be processed to the furnace and transferring the material to be processed within the furnace, being parts of industrial furnaces; susceptors, namely, susceptors for holding semiconductor wafers, being parts of industrial furnaces; electric heaters being parts of industrial furnaces; industrial furnaces; nuclear reactors and their parts and fittings, namely, parts of carbon fiber reinforced carbon composite material, namely, armor tiles, and nuclear fusion reactor plasma first wall and atomic power core material; electric heaters for semiconductor manufacturing machines and systems; electric heaters for compound semiconductor manufacturing machines and systems; furnace replacement parts, namely, electric heaters, susceptors and crucibles, for electric furnaces used for growing crystals for the manufacture of semiconductors; fittings for electric furnaces used for growing crystals for the manufacture of semiconductors, namely, electric heaters and susceptors; furnace replacement parts, namely, electric heaters, susceptors and crucibles, for electric furnaces for growing crystals for the manufacture of compound semiconductors; fittings for electric furnaces for growing crystals for the manufacture of compound semiconductors, namely, electric heaters and susceptors.