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2013-05-23 12:21
求翻译：The bottom peripheral surface of the groove 18 comprises two diametrically opposite parallel planar portions forming flat sections 18a and two diametrically opposite arched portions 18b respectively connected to the ends of the two flat sections 18a to give the groove, seen in transverse section passing through the bot是什么意思？ 待解决
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- 离问题结束还有
The bottom peripheral surface of the groove 18 comprises two diametrically opposite parallel planar portions forming flat sections 18a and two diametrically opposite arched portions 18b respectively connected to the ends of the two flat sections 18a to give the groove, seen in transverse section passing through the bot
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