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A Zeppelin is a type of rigid-framed airship.
The small passenger aircraft is designed for speed, convenience and economical operation.
The largest ocean liner at the time of its construction.
Types of bridges include beam-, arch-, suspension-, cantilever and truss bridges.
We can travel on dual carriageways on the motorway.
The animation offers a summary of the history of aviation from the Middle Ages.
Lighthouses are used as an aid to navigation in coastal waters.
From the 1940s, the increasingly large aircraft carriers became the masters of the oceans.