片语
outgoing g line引出线
Outgoing line sleeve出线套
outgoing trunk line出中继线
direction of outgoing line出线方向
heating outgoing line corridor热力管线走廊
extension line延长线;[通信] 分机线;引出线
outgoing line busy indicator出线忙指示器
incoming and outgoing line进出线
leading-out wire[电] 引出线
outgoing secondary line switch出中继第二级寻线机
outgoing only line出局专线