本文以旋转类游乐设施的典型代表—旋转秋千作为研究对象。

The typical representation of rotary recreation facilities-rotary swing was our study object in this paper.

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本文以旋转类游乐设施的典型代表—旋转秋千作为研究对象。

The typical representation of rotary recreation facilities-rotary swing was our study object in this paper.

youdao