 |
| |||
counter bore; counterbore (n machining, a counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature.  wikipedia.org) | |||
|
| |||
| counter bore; counterbore (n machining, a counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature. wikipedia.org) | |||