Across
- 4. a person who installs and maintains electrical equipment
- 7. being safe from hurt, injury or loss
- 8. gas metal arc welding
- 10. the system of pipes, tanks, fittings, and other apparatus required for the water supply, heating, and sanitation in a building
Down
- 1. working or produced by machines
- 2. polyvinyl chloride
- 3. unite by melting or softening of surfaces in contact
- 5. Occupational Safety and Health Administration
- 6. gas tungsten arc welding
- 9. stonework