General Knowledge Quiz App Download - Technology Inventions PDF e-Book
General Knowledge MCQs - Chapter 14
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Thomas Edison invented light bulb in
First car made with Teetor's cruise control method was the
First ever solar battery was invented by Bell Telephone scientists in
First 'AM' radio factory was opened in
A steam shovel is a machine designed for moving and lifting material in mining industry such as rock and soil is invented in 1835 by
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