| 单词 | pencil arm |
| 释义 | > as lemmaspencil arm pencil arm n. the arm of a device, esp. a pair of compasses, that holds a pencil for marking, recording measurements, etc. ΘΚΠ the world > relative properties > measurement > measuring instrument > [noun] > for measuring distances > compasses, dividers, or callipers > leg of a pair of compasses shank1587 point1669 pencil arm1884 society > communication > representation > a plastic or graphic representation > graphic representation > drawing plans or diagrams > [noun] > drawing instruments > for circles compassa1387 shank1587 beam-compass1785 bow-compass1796 bow-pen1869 pencil arm1884 spring bow1998 1884 Science 16 May 602/1 The special mechanical advantage claimed for the Tabor indicator [on a steam gauge] is the greater lightness of its moving parts. The pencil-arm..is substantially the same in this and other instruments. 1892 E. Rowe Hints on Chip-carving i. 9 Do not use the left hand to move the pencil-arm of the compasses. 1993 Houston Chron. (Nexis) 16 Apr. h5 Run the sharp arm of the compass along the wall-ceiling joint and keep the pencil arm directly under it, using the pencil to mark the area that will be covered by border. < as lemmas |
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