- Country: Bulgaria
- Genres: Documentary
- Release: 1987-10-17
- Director: Anna Petkova
- Writers: Anna Petkova
- Language: Bulgarian
- Stars: N/A
- Runtime: 75 min
- Awards: 1 win.
- AKA: Pretzenka , Преценка (Bulgaria) , A Judgement
- Plot:
This is a portrait of Professor Hristo Erinin - a big specialist in the area of ferrous metallurgy. He has made an invention with the real profit for 10 000 $ each year. The way to the realization of his invention is really hard.
- IMDB:tt5553526
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