Across
- 2. something that lights up the room
- 4. sound that excites workers
- 5. person who keep the place and condition of work
- 6. Wall surface in work environment that are always expose to water splashes are need to
- 9. sound that is not desired by ear at work
- 10. something that is given when you have done a good job
Down
- 1. chemicals mixed in the air
- 3. air that regulates the cold and heat of the room
- 7. a being and can be seen by the naked eye
- 8. people doing work