加上皮帶傳動機構，手把輸入旋轉運動於轉輪，用皮帶傳輸轉動另一個軸。當軸轉動時，同軸心的小齒輪不動，由另一個齒輪帶動它往反方向轉動。 The handle inputs rotation upon the wheel, then transmitted to another shaft by the belt transmission mechanism. When the shaft is rotated, the pinion with the same axle remains stationary, driven in the opposite direction by another gear.
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The handle inputs rotation upon the wheel, then transmitted to another shaft by the belt transmission mechanism. When the shaft is rotated, the pinion with the same axle remains stationary, driven in the opposite direction by another gear.