| 324 / | HD | ELECTRICITY: MEASURING AND TESTING |
| 600 | DF | IMPEDANCE, ADMITTANCE OR OTHER QUANTITIES REPRESENTATIVE OF ELECTRICAL STIMULUS/RESPONSE RELATIONSHIPS {8} |
| 629 | DF | .~ Distributive type parameters {6} |
| 637 | DF | .~.~ Using transmitted or reflected microwaves {3} |
| 639 | ![]() | .~.~.~ Where energy is transmitted through a test substance {2} |
| 640 | DF | .~.~.~.~> To determine water content |
| 641 | DF | .~.~.~.~> To determine insertion loss |