Boeing's Stratoliner 75th Anniversary" and description: "The Stratoliner, the world's first pressurized commercial airplane, was born in the 1930s, during a time of rapid evolution in the science and technology of flight, beginning with dramatic advancements in aircraft structures. Wood and fabric gave way to metal, monoplanes replaced biplanes and, before the decade was out, another great innovation would revolutionize flight—cabin pressurization.
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