Across
- 4. the thickness of something
- 5. to move in one direction
- 6. a closed system of wires and pipes
- 7. a movement of something in a particular direction
- 8. the property of allowing heat etc to go through something
- 9. a continuous raised line
Down
- 1. a small safety part in an electrical device
- 2. a force that acts to stop the progress of something
- 3. a part that combines with other parts
- 7. a device that holds a wire in position