
1947
فيلم · 21 د · وثائقي
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.
الترجمة من داخل المشغّل
من داخل الفيديو اضغط زر Servers في الزاوية، ثم اختر لغتك أو مشغّل أوضح.
السيرفرات: