| 单词 | concave-plane |
| 释义 | > as lemmasconcave-plane concave-plane n. a plane with a curved sole, used for smoothing concave surfaces. ΘΚΠ society > occupation and work > equipment > shaping tools or equipment > plane > [noun] > for curved surfaces spokeshave1510 hollow-plane1678 round1793 fork-staff-plane1815 howel1846 compass-plane1849 spout plane1855 concave-plane1874 hoop-shave1885 1874 E. H. Knight Amer. Mech. Dict. I. 604/2 Concave Plane, a compass-plane for smoothing curved surfaces. < as lemmas |
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