Across
- 4. specialized machines or electronic devices
- 5. having circular ends and straight sides
- 6. complete failure
- 9. something that gives off light
Down
- 1. worked in a rough, uneven way
- 2. move slowly and noisily
- 3. engines that make a train go forward
- 7. legal documents that make it so no one else can sell your invention
- 8. machine that plays recorded sound