| Answer | Crossword Clue |
|---|---|
| stoper | machine for drilling rock from below |
| corers | device having a hollow cylindrical drill or tube, used for taking samples of earth, rock, etc., from below the surface of the ground or ocean bottom |
| corer | device having a hollow cylindrical drill or tube, used for taking samples of earth, rock, etc., from below the surface of the ground or ocean bottom |
