injected beam-backward wave oscillator怎么读
injected beam-backward wave oscillator的發音，injected beam-backward wave oscillator的讀音，injected beam-backward wave oscillator怎麼讀，injected beam-backward wave oscillator pronunciation，发音，例句，用法，同义词，反义词由查查汉语词典提供，版权所有违者必究。