For whatever reason, Oughtred failed to publish news of his invention, but one of his students, Richard Delamain, claimed in a 1630 pamphlet to have come up with the circular slide rule.
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美
- 因為某些原因，奧特雷德沒(méi)有公開(kāi)發(fā)表他的發(fā)明，但他的學(xué)生德萊門(mén)（RichardDelamain）于1630年在一份小報上宣稱(chēng)他發(fā)明了圓形計算尺。
