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关注：1
2013-05-23 12:21
求翻译：where R1 is a frame of basis b1 centred at O. The basis b1 is defined as i1 normal to the bisecting plane and j1 along OB.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
where R1 is a frame of basis b1 centred at O. The basis b1 is defined as i1 normal to the bisecting plane and j1 along OB.
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