Of a bolt, screw, etc.: Sunk or let in so as to lie flush with the surface.
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| 单词 | θ210535 |
| 释义 | society > occupation and work > industry > working with tools or equipment > fastening > [adjective] > with screw > of hole: enlarged to receive screw-head (2) countersunk1865 Of a bolt, screw, etc.: Sunk or let in so as to lie flush with the surface. counterbored1920 |
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