65 / | HD | GLASS MANUFACTURING |
17.1 | DF | PROCESSES {32} |
33.1 | DF | .~ Devitrifying glass or vitrifying crystalline glass (e.g., starting with or forming crystalline glass, etc.) {6} |
33.2 | .~.~ Electromagnetic radiation or resulting heat utilized (e.g., gamma rays, X-rays, atomic particles UV, visible, IR, actinic, laser, microwave or radio wave, etc.) |