Harmonized system of quality assessment for electronic components: sectional specification: display storage tubes|Image storage tubes, Storage tubes, Cathode-ray tubes, Electron-beam tubes, Electron tubes, Electronic equipment and components, Quality assurance systems, Assessed quality, Qualification approval, Approval testing, Inspection, Specification (approval), Electrical testing, Electrical measurement, Electron tube components, Voltage measurement, Performance testing, Luminance, Resolution, Defects, Current measurement, Pulse circuits, Time measurement, Optical measurement