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 |