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Inventions App Download | Seismograph Quiz App (iOS & Android)

Inventions Competitive Exam: Certification Test 568

Seismograph Quiz App Download & PDF e-Book - 568

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MCQ: 568

First modern seismograph was patented by

  1. Sir Walter Brattain
  2. Sir T.J Blachut
  3. Sir John Milne
  4. Sir Walter Wingfield
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Seismograph Quiz App (iOS & Android)

Seismograph Quiz App

Seismograph Quiz App (Android & iOS)

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Inventions Quiz App (Android & iOS)

Inventions Quiz App

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8th Class Science Test Questions

8th Class Science Quiz with Answers