Inventions e-Book's MCQs - Complete
Electric Elevator Quiz App Download & e-Book - 35
Apps:
MCQ:
The electric elevator was invented by a manufacturer named as
- Sir Jack Kilby
- Sir Schuyler Skaats Wheeler
- Sir Walter Brattain
- Sir William Sturgeon
b
Inventions App & e-Book Tests PDF Download
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General Knowledge MCQs eBook Download
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