The bicycle wheel includes an airvalvestem and a magnet mounted to the airvalvestem.
自行车车轮包括气阀杆和安装于气阀杆上的磁铁。
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The sensor is fixedly attached to the bicycle brake at a location to detect rotational behaviour of a bicycle wheel by sensing the magnet mounted to the airvalvestem.
The spring return pneumatic actuators use an air supply to drive the valvestem in one direction and an internally loaded spring to return to the valve to its original position.