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Dirigible balloon rigidified by helium tanks
Dirigible balloon rigidified by helium tanks
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机译:氦罐加固的可飞球气球
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摘要
A variable-lift device using a helium to fly. The device comprises a balloon (1) composed of an outer flexible envelope (3) supported by a rigid structure. The rigid structure comprises a plurality of hollow toruses (4) of inside volume that acts as a tank for storing helium under pressure.
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