At last it discusses the dual-mode transmission technology of the Ultra Narrow Band Modulation and the FM combination.

最后着重讨论了超窄带调制与FM结合的双模式传输技术。

youdao

At last it discusses the dual-mode transmission technology of the Ultra Narrow Band Modulation and the FM combination.

最后着重讨论了超窄带调制与FM结合的双模式传输技术。

youdao