【单选题】【消耗次数：1】
多级齿轮传动中，各级传动比相等的分配原则适用于按（?? ）设计的传动链。
①
输出轴的转角误差最小原则
②
重量最轻原则（大功率装置）
③
重量最轻原则（小功率装置）
④
最小等效转动惯量原则
参考答案：
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