Week 2 Crossword puzzle

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Across
  1. 2. its abbreviation is SOV
  2. 6. its abbreviation is AIR COND
  3. 8. its abbreviation is DF
  4. 9. its abbreviation is GPM
  5. 11. its abbreviation is AP
  6. 13. its abbreviation is FEXT
  7. 14. its abbreviation is LB/CU/FT
  8. 17. its abbreviation is BT
  9. 19. its abbreviation is GL
  10. 20. its abbreviation is THERM
  11. 21. its abbreviation is VEL
Down
  1. 1. its abbreviation is X
  2. 3. its abbreviation is HWH
  3. 4. its abbreviation is BTU
  4. 5. its abbreviation is CW
  5. 7. its abbreviation is MRR
  6. 10. its abbreviation is BSMT
  7. 12. its abbreviation is CLG
  8. 15. its abbreviation is CEM FL
  9. 16. its abbreviation is FPRF
  10. 18. its abbreviation is BKR
  11. 21. its abbreviation is V