| 单词 | parallel ruler |
| 释义 | > as lemmasparallel ruler parallel ruler n. (also parallel rulers) an instrument for drawing parallel lines, consisting of two or more straight rulers connected by jointed crosspieces so as to be always parallel, at whatever distance they are set. ΚΠ 1704 J. Harris Lexicon Technicum I Parallel Ruler. 1754 N.Y. Mercury 27 May James Ham,..makes and sells all sorts of mathematical instruments,..as, Theodolite's circumferenter's, sectors parallel rulers, protractors, [etc.]. 1846 C. Dickens Dombey & Son (1848) ix. 88 Mr. Brogley..went, softly whistling, among the stock; rattling weather glasses, shaking compasses,..setting parallel rulers astride on to his nose, [etc.]. 1951 H. Wouk Caine Mutiny (1952) v. xxix. 317 Maryk at once handed over the dividers and parallel rulers. 1990 T. Cunliffe Easy on Helm xiii. 111 The boat will swivel on the pair of lines [sc. stern spring and bow line] like one arm of a parallel ruler, the other arm in this case being the dock. < as lemmas |
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