片语
telephone traffic channel电话业务信道
telephone channel tester通话电路测试器
carrier telephone channel载波电话信道
telephone channel facsimile machine话路传真机
telephone channel equalization of电话信道等化
telephone service channel电话业务信道
telephone channel facsimile apparatus话路传真机
mobile telephone control channel移动电话控制信道
mobile telephone locating channel移动电话定位信道