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Dewar Flask Notes e-Book PDF | Inventions App Download

Inventions Study Guide: Certification Test 141

Dewar Flask Notes App Download & e-Book - 141

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MCQ: 141

The first thermos was patented by

  1. Sir James Dewar
  2. Sir Etienne Montgolfier
  3. Sir Alfred Nobel
  4. Sir Henri Giffard
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Dewar Flask Study Guide: Inventions App & eBook Notes

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Dewar Flask Notes App (iOS & Android)

Dewar Flask Notes App

General Knowledge Notes App (Android & iOS)

General Knowledge Notes App

Global Warming Notes App (Android & iOS)

Global Warming Notes App

Basic Control Systems Notes App (Android & iOS)

Basic Control Systems Notes App

General Knowledge MCQs e-Book Download

General Knowledge e-Book PDF

General Knowledge MCQ e-Book PDF

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8th Class Science Test Questions

8th Class Science Quiz with Answers