“Joule-Thomson valve”的概念、定义、翻译、参考文献-科学参考

单词	Joule-Thomson valve
释义	Joule-Thomson valve [`jül `täm·sǝn ´valv] ^CRYOGENICS A valve through which a gas is allowed to expand adiabatically, resulting in lowering of its temperature; used in production of liquid hydrogen and helium.
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