mine shaft entrance is a type of…
- en dangerous thing (n) ➜
- en land topographical feature (n) ➜
- en man made object (n) ➜
- en man made structure (n) ➜
- en portal (n) ➜
- en unnatural thing (n) ➜
- en walled cavity (n) ➜
Links to other resources
- sw.opencyc.org /2012/05/10/concept/en/MineShaftEntrance
