two-frequency duplex

Duplex refers to a movement with a two-wheel escapement.

复式指的是机芯有一个两个轮子的擒纵器。

One-way simplex , two-way simplex, or duplex operation can be specified.

可指定为单向单工 、 双向 单工或双工运行.

We also design a voice transmitting software, which can simulate VoIP within LAN environment with Visual C++ so as to realize full-duplex voice communication in two computers on Internet. The project includes two parts: multimedia ( includes recording and playing) and transmission.

并用Visual c++设计模拟VOIP的小型局域网上的语音传输软件，实现Internet上两台计算机的全双工语音通信，主要包括多媒体部分（录音、放音）和传送部分。

Telegraph repeater. One-way simplex , two-way simplex, or duplex operation can be specified.

电报中继器. 可指定为单向单工 、 双向 单工或双工运行.

Medical Pedal Switch has two models, such as single and duplex, and subdivides into 3 specs.

医用脚踏开关系列有单联和双联两种型号3个规格.