cathode-ray oscilloscope
preferred label: نوسان‌نمای پرتو کاتدی @fa
type: Concept
related: oscillograph

time measurement
preferred label: اندازه‌گیری زمان @fa
type: Concept
related: oscillograph

recorder
preferred label: دستگاه ضبط صوت @fa
type: Concept
narrower: oscillograph

oscillograph
alternative label: oscillograms
related: cathode-ray oscilloscope
related: time measurement
broader: recorder
preferred label: نوسان‌نگار @fa
type: Concept