Proud 640
A picture of the new step-by-step process of building construction called "flow 640", which ensures optimal continuity of the individual professional parts of building construction.
- Year: 1950
- Country: Czechoslovakia
- Genre: Documentary
- Studio: Studio populárně vědeckých a naučných filmů Gottwaldov
- Keyword: civil engineering
- Director: Oldřich Mirad
- Cast: