tributary unit group 支路单元组

Line unit and tributary unit 线路单元与支路单元

tu tributary unit 支路单元 ; 附属单元

tug tributary unit group 支路单元组 ; 附属单元组

Tributary unit loss of pointer 支路单元指针丢失

Tributary Unit TU 支路单元

Tributary Unit Pointer 支路单元指针

Tributary unit alarm indication signal 支路单元告警指示信号

Tributary Unit Payload Process 支路净荷处理