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General Knowledge Cerification Guide: Practice Test 27 (Chapter 14)
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The Quiz: Earliest version of Cathode Ray Tube was invented in; "Technology Inventions Quiz" App (iOS, Android) with answers: 1839, 1859, 1844, and 1897 for BSc degree entrance exam. Study Max Born Quiz Questions, download Google Book (Free Sample) for online assessment test for jobs.
Earliest version of Cathode Ray Tube was invented in
Adhesive bandage which is popularly known as Band Aid was invented by
Nickel zinc battery which is used in digital cameras and cordless telephone was invented by
First steam engine builds to pump water by Thomas Newcomen in
Transistors used in all modern electric products was invented in
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