| Descriptors |
Approval testing, Adhesion tests, Inspection, Assessed quality, Gas-discharge tubes, Performance testing, Sensitivity, Qualification approval, Electron tubes, Testing conditions, Amplification, Electrical testing, Test equipment, Gas-filled tubes, Photomultipliers, Specification (approval), Circuits, Quality assurance systems, Phototubes, Electronic equipment and components, Cold-cathode tubes, Resolution, Sampling methods, Electrical measurement
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