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Inventions MCQs – Certification Test 550

Electric refrigeration unit MCQs (Question 550) – App & e-Book Download

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MCQ 550: Electric refrigeration unit was patented by:

  1. Sir Henry W. Seelay
  2. Sir Schuyler Skaats Wheeler
  3. Sir Nathaniel B. Wales
  4. Sir Gideon Sundback
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Electric refrigeration unit Apps (Android & iOS)

8th Class Science Test Questions

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