Collocations

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Across
  1. 3. Not logically valid in theory
  2. 4. Almost too easy to be true
  3. 6. Lasts longer than expected
  4. 9. Lower in comparison
  5. 10. Easy to see or notice
  6. 12. Totally redundant
  7. 13. Conducts electricity surprisingly well
  8. 14. Airtight and sealed
  9. 15. Of great importance
Down
  1. 1. Separated from heat transfer
  2. 2. Has enough power
  3. 5. Cannot be moved or changed
  4. 7. Powerful yet space saving
  5. 8. Extremely effective or productive
  6. 11. A serious error