| 505 / | HD | SUPERCONDUCTOR TECHNOLOGY: APPARATUS, MATERIAL, PROCESS |
| 825 | DF | APPARATUS, PER SE, DEVICE, PER SE, OR PROCESS OF MAKING OR OPERATING SAME {36} |
| 912 | DF | .~ Metal founding: (Class 164) {1} |
| 913 | DF | .~.~ Casting process {3} |
| 916 | ![]() | .~.~.~ Continuous casting |