two unit是什么意思及用法

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two unit 英[tu: ˈju:nit] 美[tu ˈjunɪt] [词典] 双机组; [例句]The balanced doubler, which can reject odd harmonic, consists of active balun and two unit FET doublers. 平衡式倍频器由有源Balun和两个FET倍频单元构成，实现了对奇次谐波的有效抑制。