“pneumatic control valve”的概念、定义、翻译、参考文献-科学参考

单词	pneumatic control valve
释义	pneumatic control valve [nu̇`mad·ik kǝn`trōl ´valv] ^{MECHANICAL ENGINEERING} A valve in which the force of compressed air against a diaphragm is opposed by the force of a spring to control the area of the opening for a fluid stream.
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