“expansion ratio”的概念、定义、翻译、参考文献-科学参考

单词	expansion ratio
释义	expansion ratio [ik`span·shǝn ´rā·shō] ^{FLUID MECHANICS} For the calculation of the mass flow of a gas out of a nozzle or other expanding duct, the ratio of the nozzle exit section area to the nozzle throat area, or the ratio of final to initial volume. ^{MECHANICAL ENGINEERING} In a reciprocating piston engine, the ratio of cylinder volume with piston at bottom dead center to cylinder volume with piston at top dead center.
随便看	heat capacity heat check heat coil heat conduction heat conductivity heat content heat convection heat cramps heat cycle heat death heat development heat dissipation heat distortion point heat dump heat energy heat engine heat equation heat equator heater heater oil heater-treater heater-type cathode heat exchange heat exchanger heat exhaustion

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