Descriptors | Glow modulator tubes, Glow-discharge tubes, Cold-cathode tubes, Gas-discharge tubes, Gas-filled tubes, Electron tubes, Electronic equipment and components, Quality assurance systems, Assessed quality, Qualification approval, Approval testing, Inspection, Specification (approval), Marking, Sampling methods, Testing conditions, Mechanical testing, Adhesion tests, Soldered joints, Depth, Endurance testing, Electrical testing, Electrical measurement, Test equipment, Circuits, Voltage measurement, Performance testing, Luminous intensity, Optical measurement |