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 | December 31, 1950 | |
|---|---|---|
| Status | Released | |
| Original Title | Proud 640 | |
| Runtime | — | |
| Budget | — | |
| Revenue | — | |
| Language | Czech | |
| Original Language | Czech | |
| Production Countries | Czechoslovakia | |
| Production Companies | Studio populárně vědeckých a naučných filmů Gottwaldov | |