Railways of the GDR.
NDP "FOR ROADS."
GDR. PNRM. urban parks, fountains.
In a mobile laboratory conducted continuous observations of air quality.
Conducted experiments to create on the surface of bulk cargo transported solid crust.
Excavator loading coal.
Coal is moistened with water.
Freight train transporting coal in covered wagons.
Railwaymen tarp covered gondola with bulk cargo.
Rail road Hungary.
NDP "GUARANTEED serviceable engine"
Passenger train moves along the railway track.
Smokes a pipe.
Railway workers are working to reduce the amount of harmful emissions into the atmosphere, diagnose the proper operation of the engine, fuel system locomotive, is determined by means of special devices the chemical composition of the exhaust gases, soot concentration in them.
NDN "water will remain clean"
Cargo train moves along the railway track.
Structures treating plant.
On the way to the finished product warehouse part antiseptic flows to the ground.
Type of sewage treatment plants to prevent poisoning the soil and water with toxic substances.
Workers, laboratory assistants are working on water purification.
PNRM. flocker on, distributed therein oil, resin and water.
Driver controls the train.
Trains and roads.