施工建筑专业英语词典T-117-SCIdict学术... ... 状态监控，直通监控(信号) through supervision 转接(电话)局 through switching exchange 穿过式桁架桥 through truss bridge ...
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Exchange service is a service permitting interconnection of any two customers' stations through the use of switching equipment.
交换服务是一种允许任何两个用户站使用交换设备互连的业务。
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