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This animation demonstrates the equipment of a police patrol car.
This animation demonstrates the most important equipment of ambulance cars.
We can travel on dual carriageways on the highway.
The bicycling manual contains rules concerning the safety equipment of bicycles.
Buses play an important role in public transportation.
The train operates between Paris and southern Germany, its cruise speed is 320 km/h (199...
This animation demonstrates how elevators work.
Types of bridges include beam-, arch-, suspension-, cantilever and truss bridges.