One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； March 3rd
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Multiple-choice question: The belt drive in the calcium carbide crushing station relies on ( ) to transmit power. A. The driving pulley and the driven pulley rotate together. B. The compressive force generated by the contact between the belt and the pulleys. C. The friction between the driven pulley and the belt. D. The friction between the transmission belt and the pulleys. Answer: D, the friction between the transmission belt and the pulleys
D. Frictional force between the transmission belt and the pulley