The mechanical transmission model includes belt transmission, turbo-rod transmission, chain transmission, cylindrical gear transmission, bevel gear transmission, friction wheel transmission and other transmission forms. In order to facilitate the experiment and improve the observation effect, the instrument is driven by DC motor. First, the DC motor drives the vortex rod through the belt to complete the belt transmission, and then the vortex rod drives the turbine to achieve the turbine vortex rod transmission. After the above two deceleration, the vortex shaft rod drives the chain of the next level to rotate, and then the next step is driven by the cylindrical gear transmission, bevel gear transmission and friction wheel transmission.

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