Famous inventors

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Across
  1. 5. Radio
  2. 7. Light Bulb
  3. 9. Computer
  4. 10. Television
Down
  1. 1. Gravity
  2. 2. Zero
  3. 3. Thermometer
  4. 4. Electricity
  5. 6. Aeroplane
  6. 8. Telephone