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。
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。
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。
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