单词	ballonet
释义	ballonet /ˌbaləˈnā / (also ballonnet) noun A separate gas- or air-filled compartment within the main envelope of a balloon or airship, designed for the maintenance or adjustment of the envelope’s shape, buoyancy, or orientation.The helicopter is fitted with ballonet flotation devices for emergency landing on water.... As a rule, such airships have a soft structure of a ballonet and consequently a considerable drag. This triggers an automatic mechanism that pumps air into the ballonet compartment to compensate. Origin French.
随便看	prodigence prodigial prodigiosin prodigiosity prodigious prodigiously prodigiousness prodigy prodissoconch prodnose prodroma prodromal prodrome prodromic prodromus pro-drop prodrug produce produceable producedness producement producent producer Producer Choice producer gas

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