a hole in a nut, collar piece, box spanner, etc., into which a steel pin or tommy bar can be inserted to turn it.
| 单词 | θ213131 |
| 释义 | society > occupation and work > equipment > building and constructing equipment > fastenings > [noun] > nut > part of nut (1) tommy hole1864 a hole in a nut, collar piece, box spanner, etc., into which a steel pin or tommy bar can be inserted to turn it. |
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