| 324 / | HD | ELECTRICITY: MEASURING AND TESTING |
| 425 | DF | ELECTROLYTE PROPERTIES {3} |
| 439 | DF | .~ Using a conductivity determining device {8} |
| 446 | ![]() | .~.~ Having conductance probe structure {3} |
| 447 | DF | .~.~.~> With movable or adjustable electrode |
| 448 | DF | .~.~.~> With concentric electrodes |
| 449 | DF | .~.~.~> With axially arranged electrodes |