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关注：1
2013-05-23 12:21
求翻译：Fig. 2 illustrates both forces during the trajectory of a fertiliser particle on the disc for both a flat and a concave disc.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
Fig. 2 illustrates both forces during the trajectory of a fertiliser particle on the disc for both a flat and a concave disc.
问题补充： |
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