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關注：1
2013-05-23 12:21
求翻譯：This problem can be solved in cylindrical polar co-ordinates (z,r,) by considering a 60 angular sector as shown in the diagram where k refers to r-z planes in the -direction.是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
This problem can be solved in cylindrical polar co-ordinates (z,r,) by considering a 60 angular sector as shown in the diagram where k refers to r-z planes in the -direction.
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