| 29 / | HD | METAL WORKING |
| 592 | DF | METHOD OF MECHANICAL MANUFACTURE {54} |
| 407.01 | DF | .~ With testing or indicating {4} |
| 407.05 | ![]() | .~.~ Quantitative measuring or gauging {3} |
| 407.06 | DF | .~.~.~> By radioactive tracing |
| 407.07 | DF | .~.~.~> By vibratory or oscillatory movement |
| 407.08 | DF | .~.~.~> Pressure, force, or weight determining |