bidirectional devicebilateral device双向: two-way器件: device; parts of an apparatu ...反向器 ,起偏电压器件: polarity or polarizi ng voltage device器件: device; parts of an apparatus or appliance; component 电子器件 electronic device双向开关半导体器件 交流控制半导体元件: ovonics下载手机词典可随时随地查词查翻译