| 摘要 |
In the warning signal emitter a first section is mounted on a vehicle with siren, and is designed to transmit electromagnetic waves, consisting of a carrier modulated in accordance to coded signals, when the siren is operated, while a second section is mounted on a vehicle, in a place near to the driver, and is designed to receive the electromagnetic waves and to operate a lamp and/or a buzzer when it recognises the coded signals. |
