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 |