65 / | HD | GLASS MANUFACTURING |
376 | DF | PROCESSES OF MANUFACTURING FIBERS, FILAMENTS, OR PREFORMS {18} |
385 | DF | .~ Process of manufacturing optical fibers, waveguides, or preforms thereof {29} |
404 | .~.~ With step of casting or forming nonfiber workpiece (e.g., molding liquid preform, shaping molten glass against a forming surface, etc.) |