以下为句子列表：
英文: A kind of mechanical patterned step-less variator with specified range of application has been introduced. The composition, working principle of this mechanism and its designing calculation were expounded.
中文: 摘要介绍了一种具有一定应用範围的机械式无级变速器。阐述了该机构的组成、工作原理及其设计计算。
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