Then switchboards brought phone wires into one location.

然后，交换台使电话线集中到一个地点。

You are right, since main switchboards are located there.

你说得对。因为主配电板安装在这里。

This center controls the work of controllers and switchboards etc.

中心控制室，控制交换机和控制器等设备的工作。

General electric company is the leading manufacturer of industrial switchboards.

通用电气公司是主要的工业配电盘生产厂家。

Activity of Moscow switchboards shown. At night people call each other much less.

如莫斯科的交换机活动表所示；晚上，月黑风高，打电话的人们少了很多。