| 单词 | tommy hole |
| 释义 | > as lemmastommy hole tommy hole n. a hole in a nut, collar piece, box spanner, etc., into which a steel pin or tommy bar can be inserted to turn it. ΘΚΠ society > occupation and work > equipment > building and constructing equipment > fastenings > [noun] > nut > part of nut tommy hole1864 1864 D. K. Clark Exhib. Machinery 1862 175/1 The plate rests on three screws with spherical heads, having ‘tommy holes’, by means of which the plate may be levelled with accuracy. 1897 A. C. Pemberton Compl. Cyclist 125 The head nut, which could be made with a milled edge, and with tommy holes to start it if stuck beyond finger power. 1988 Brit. Patent 2,200,681 5 The locking ring is circular and is provided with tommy holes in order to facilitate tightening. < as lemmas |
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