收发转换开关 t r switch ; send-receive switch ; transmit receive switch

天线收发转换开关 [电讯] duplexer ; [电讯] antenna duplexer ; anti transmit receive switch

双道天线收发转换开关 two-channel duplexer ; channel duplexer

天线[收发]转换开关 antenna duplexer

发送电子转换开关 cyclodos

发动机转换开关 engine change-over