连接终端用户（如企事业单位、家庭〕的交换机、集团电话(含具有交换功能的电话连接器)、或普通电话机等与电信运营商(网通、电信等〕的市话交换机的电话线路多统称为中继线
中继线群 [通信] trunk group ; link group ; link set
局内中继线 [通信] local trunk ; [通信] intra-office trunk ; cross office trunk
席间中继线 [通信] interposition trunk
双向中继线 BWT BothWayTrunk ; [通信] both-way trunk line ; two-action trunk ; bothway trunk
单向中继线 [通信] one-way trunk ; onion skinning ; [通信] single action trunk
来中继线 incoming trunk
局间中继线 [通信] interoffice trunk ; IOT InterOfficeTrunk
中继线路 [通信] trunk circuit ; trunk line
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链路：节点间的支路，称为中继线。
在支线和中继线的接合点，电线必须被叠接起来。
At the junction of a branch line and the trunk line, the wires must be spliced together.
由于网络的中继线出了问题，造成数据通信不畅，技术人员正在抢修。
As there is something wrong with the trunk line of the network, the transmission of data is blocked. The technical staff is urgently repairing it.
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