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设小皮带轮直径为 D_1,大皮带轮直径为D_2,其中心距为 C,则套在其上的开口皮带全长可用下式表示:(参照图2-15)
If the diameter of the small pulley is D_1 and the diameter of the large pulley is D_2, the center distance of the pulley is C, then the total length of the open belt sleeved on it can be expressed as follows: (refer to Fig. 2-15)