--subdivision Electronic equipment under types of industries and individual land vehicles and types of land vehicles, e.g. Construction industry--Electronic equipment; Automobiles--Electronic equipment
Here are entered works on test instruments in which the variations in an electrical quantity appear temporarily as a visible waveform on the screen of a cathode ray tube. Works on instruments that combine an oscilloscope with a camera to produce a permanent record of a waveform are entered under Cathode ray oscillographs.
