Assembly line was invented by
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Who Invented the nuclear reactor?
Who discovered Circulatory System?
Blood Circulation was discovered by?
Who invented the mobile phone?
Who invented Helicopter?
Which of the following was invented by Sir Humphry Davy?
Which country on 23 October 2017 signed the Paris agreement on climate change, leaving the United States and Syria as the only two countries holding outto sign this global climate pact?