Proud 640 (1950)
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.
- Release Date: 1950-12-31
- Runtime: 1h 36min
- Production Company: Studio populárně vědeckých a naučných filmů Gottwaldov
- Production Country: Czechoslovakia
- Director: Oldřich Mirad
- Writer: Oldřich Mirad
