可选的，X2的速度输出提供两倍的改善低速运行的每转脉冲数。
An optional, X2 speed output provides twice the number of pulses per revolution for improved low speed operation.
硬件局部应用霍尔元件将自行车每转一圈的脉冲数送入单片机系统，然后单片机系统将旌旗灯号颠末处置送显现。
Hardware part USES hall element will bike every one round number of pulses into SCM system, then SCM system will signal processed send display.
硬件局部应用霍尔元件将自行车每转一圈的脉冲数送入单片机系统，然后单片机系统将旌旗灯号颠末处置送显现。
Hardware part USES hall element will bike every one round number of pulses into SCM system, then SCM system will signal processed send display.
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