以下为句子列表：
英文: The optimization selection and comparison have been conducted on the ratios of major structural dimensions of ball cage patterned constant speed universal joint namely the ratio between central circle diameter of steel ball and ball diameter, the ratio be
中文: 对球笼式等速万向节的主要结构尺寸即钢球中心圆直径与钢球直径之比、万向节外径与内套花键分度圆直径之比，以及球笼式等速万向节的偏心距与钢球中心圆半径之比进行了优化选择和比较。
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