三路阀
three-way valve
三路管
three-way connection; three-way pipe
三路活塞
three-way stop-cock
三路活栓
three-way stop cock
三路控制阀
three-way control valve
三路龙头
three-way tap
三路配置
three-way layout
三路栓
three-way stop cock
三路扬声器系统
three-way speaker system
热电时间延迟开关
thermal time-delay switch
热控开关
thermal switch
热敏开关
temperature switch
人工开关
manual switch
任选开关通道
optional switched channel
熔断开关
fuse cutout; safety cutout
入口开关
entry switch
三端开关
three-terminal switch
三端开关元件
trigistor
三端快速半导体开关
trisistor
三级开关
three-level switch