【填空题】【消耗次数：1】
鼓式制动器各蹄衬片总的摩擦面积越大，制动时所受单位面积的正压力和能量负荷越小，从而[填空1]越好。
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盘式制动器制动衬块单位面积占有的汽车质量，推荐[填空1]kg/cm2范围内选用。
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盘式制动器制动盘的直径通常选择为轮辋直径的[填空1]。
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