| 摘要 |
There is described a vehicle braking assembly for a wheel which comprises a braking member arranged to move relative to the main body of the wheel betwe en an inoperative and an operative position, blocking means adapted to prevent the braking member from moving to an operative position characterised in tha t the trigger means is operable by coded message passed by a separate transmitter as electromagnetic radiation and the assembly is provided with a n EMR sensor. |
