Let's Look at Water
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.
Palabra clave:
Let's Look at Water 1947
transportation
water supply
urban
water purification
city
ONF | NFB
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