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A different approach to the walker is the rollator, also called wheeled walker, invented by the Swede Aina Wifalk in 1978. Wifalk had polio . [ 9 ] [ 10 ] Although originally a brand name, "rollator" has become a genericized trademark for wheeled walkers in many countries, and is also the most common type of walker in several European countries.
The wide-body age of jet travel began in 1970 with the entry into service of the first wide-body airliner, the four-engined, partial double-deck Boeing 747. [13] New trijet wide-body aircraft soon followed, including the McDonnell Douglas DC-10 and the L-1011 TriStar. The first wide-body twinjet, the Airbus A300, entered service in 1974. This ...
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