0 hr 21 min
|1947
This short documentary shows how a city's water supply is purified at a filtration plant. The complex system of the underground mains that supply all parts of the city with water is also illustrated, as is the safeguarding of water supplies on trains, ships and aircrafts.
Status
Released
Release Date
1947-01-01
Runtime
0 hr 21 min
Votes
0Count | 0Average
Genres
Languages
English |