双列双向推力轴承 [机] double row double-direction thrust bearing

双向时分双工 TDD

双向操作双向工作 two way operation

双向双工电路 two-way duplex circuit

双纤双向线性倒换环 two-fiber bidirectional linear switched ring

双向半双工电路 two-way half-duplex circuit

双向转换器双向传感器 bidirectional transducer

双向的双通的 two-way

双向双扩散 double diffusion in two dimension

双向双语 Two-Way Immersion