Research Institute for Physical-Engineering and Radiotechnical Metrology (VNIIFTRI) acts as the Main Metrological Center of the State Service of Time and Frequency. EU1 reference unit for reproducing and transmitting the density standard. Mendeleyevo, Moscow Region.
- Categories: Science & Technology
- Location: Moscow region, Russia
- Event date: 11.03.1981
- Date published: 11.12.2022
- Credit: Sputnik
- Original: 81-3224, 35 mm film
- Media: JPEG, 5372x3543px, 4.5Mb