wide area telecommunications service
... UPT universal personal telecommunications 通用个人通信 WATS wide area telecommunications service 宽域性远程通讯服务 coder 编译码顺，编码器；编码员 ...
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service, wide area telecommunications
service, wide area telecommunications (WATS) 宽域性远程通讯服务 service-specific convergence sublayer (SSCS) 特定业务汇聚子层 ..
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