Hierarchy classification:

1. top of the aat hierarchies
2. Agents Facet
3. People (hierarchy name)
4. people (agents)
5. [people by occupation]
6. [people in engineering, building trades and planning]
7. construction workers

Anotations

Scope note:

Men or women who operate a drill, which is a large machine or hand tool used for making holes in a variety of materials. For workers that conduct the secondary process of enlarging or refining drilled holes to particular tolerances, use "borers."