Retro-Technika.com
English
English
తెలుగు
bahasa Indonesia
Shqip
Gaeilge
العربية
Tiếng Việt
lietuvių kalba
日本語
فارسی
Tagalog
Oscilloscope `` OKR-2 ''.
Instruments for adjusting and controlling the PTA.
Oscilloscope `` OKR-2 '' has been produced since 1937. The oscilloscope is designed for visual observation of various low frequency AC signals.