“helix travelling wave tube”的概念、定义、翻译、参考文献-科学参考

单词	helix travelling wave tube
释义	helix travelling wave tube Encyclopedia 工学行波管释 helix travelling wave tube螺旋线行波管慢波结构为螺旋线的行波管。
随便看	positive trace positive type positive uniaxial crystal positive value positive variation positive variation of a function positive variation of signed measure positive vector positive vector bundle positive vibrating mitigation positive Weyl chamber positive youth development positive zero positivism positivism methodology of psychology positivism policy analysis positivist history positivistic sociology positivist jurisprudence positivity positivity axiom positivity domain positivity property positizable operator positroid boundaries

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