bidirectional line switch ring 双向线路交换环

Unidirectional Path Switch Ring 单向通道倒换环

Uni-directional Path Switch Ring 单向通道倒换环

switch ring leap 交换腿结环

Unidirectional Line Switch Ring 单向线路倒换环

token ring switch 令牌环交换

ring switch [电] 环形开关

ring type horn switch 环式喇叭钮

Temperature switch Seal Ring 温度开关封圈