- diverter vlv
- 线: thread; string; wire
- 切换线路服务: alternate line service
- 换线: change lane
- 切换: alt; automatic switchover; blocked out; changeover; handover ho; shear; throw-over; to cut over; to switch over to, switch---to throw--over switching over; to switch over to, switch、to throw、over switching over; to switch over to, switch―to, switching over; toggle; toswitchoverto,switch---tothrow--overswitchingover; transition
- 变换线: conversion line
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