| 释义 |
planometer|pləˈnɒmɪtə(r)|
[f. as prec. + -meter.]
An accurately made flat plate, usually of cast iron, used as a standard gauge for plane surfaces; a surface-plate. So plaˈnometry, the use of a planometer; the measurement or gauging of plane surfaces.
1864Webster, Planometer. 1875Knight Dict. Mech. 1726/2 Plane-surfaces are produced by the planing-machine, by the file, and by grinding... For the purpose of verifying their accuracy, the planometer was devised by Whitworth. |