line open-wire vioce 明线化频线路

open wire line 架空眠 ; 开放式系统作业 ; 架空线路 ; 明线

Aerial Open Wire Line 架空明线线路

open-wire line 开环控制 ; 明线

open-wire voice line 明线话频线路

open wire communication line 架空明线线路

open wire carrier line 明线载波线路

open wire telecommunication line 架空明线线路

open two-wire line 双明线

open-wire carrier line 明线载波线路