该系统产品由网管系统，头端，中继器，客户端组成。

The system products is consisted of net management system, the head-end, Repeaters and client.

youdao

该系统产品由网管系统，头端，中继器，客户端组成。

The system products is consisted of net management system, the head-end, Repeaters and client.

youdao