a spanner or wrench with a hollow polygonal head that fits over and may completely cover the nut, stopcock, etc., to be turned.
| 单词 | θ212430 |
| 释义 | society > occupation and work > equipment > screwdrivers, wrenches, spanners > [noun] > spanner or wrench > box-spanner (3) box spanner1849 a spanner or wrench with a hollow polygonal head that fits over and may completely cover the nut, stopcock, etc., to be turned. box key1874 (a) a key used to lock or unlock a box; (b) a tool with a hollow polygonal end that fits over and may completely cover the nut, bolt, etc., to be… box wrench1880 a wrench or spanner with a hollow polygonal head that fits over and may completely cover the nut, stopcock, etc., to be turned; = box spanner n. |
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