1950s Twin-Turbine Helicopters

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Boeing Vertol CH-46 Sea Knight

Boeing Vertol CH-46 Sea Knight

United States 1950s

Sikorsky SH-3 Sea King

Sikorsky SH-3 Sea King

United States 1950s

Sikorsky H-34

Sikorsky H-34

United States 1950s

Mil Mi-6

Mil Mi-6

Soviet Union 1950s

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