78.The first successful commercial jet flight took place in 1952.

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aviation
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airplane
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jetengine
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commercialflight
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passengers
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airtravel
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innovation
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history
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transportation
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speed
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comfort
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convenience
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technology
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progress
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milestone
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breakthrough
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aircraft
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airlineindustry
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boeing
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dehavillandcomet
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development
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modernization
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evolution
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globalization
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mobility
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efficiency
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aerospace
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jetage
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turbojet
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flight