324 / | HD | ELECTRICITY: MEASURING AND TESTING |
76.11 | DF | MEASURING, TESTING, OR SENSING ELECTRICITY, PER SE {46} |
76.12 | DF | .~ Analysis of complex waves {3} |
76.19 | DF | .~.~ Frequency spectrum analyzer {7} |
77.11 | .~.~.~ Nonscanning {5} | |
76.28 | DF | .~.~.~.~> Digital filter |
76.29 | DF | .~.~.~.~> With filtering {1} |
76.33 | DF | .~.~.~.~> Correlation {1} |
76.35 | DF | .~.~.~.~> With delay line |
76.36 | DF | .~.~.~.~> With optics {1} |