| 335 / | HD | ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS |
| 209 | DF | MAGNETS AND ELECTROMAGNETS {10} |
| 285 | DF | .~ Work or object holding type {4} |
| 289 | DF | .~.~ Electromagnet type (e.g., electromagnetic chuck) {2} |
| 291 | DF | .~.~.~ Lifting or attracting type (e.g., for lifting pigiron or pulling hairpins) {3} |
| 293 | ![]() | .~.~.~.~ Hand-held type |