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Inventions Exam Prep: Certification Test 502

Steel Learning App & e-Book: MCQ 502

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MCQ: 502

The first process for mass producing steel inexpensively was patented by

  1. Sir Henry Bessemer
  2. Sir William kennedy Dickson
  3. Sir John Barber
  4. Sir Blaise Pascal
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8th Class Science Test Questions

8th Class Science Quiz with Answers