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Free Inventions MCQ App Download | String Trimmer e-Book PDF
Inventions Study Guide: Mock Test 38
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The MCQs: Which one of following developed most important landscaping tool named as string trimmer; "String Trimmer" App (Android, iOS) with answers: sir raymond damadian, sir stephen poplawski, sir stephen poplawski, and sir george ballas for school certificate. Practice inventions and inventors questions and answers, Apple Book to download free chapter for online school courses.
Which one of the following developed the most important landscaping tool named as string trimmer?
Radio was devised by an Italian inventor named as?
In which one of the following year, Ac radio tube was invented?
In which one of the following year, spark plug was patented?
In which one of the following year, the X ray machine was invented?
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