Which object, initially called the 'Whirlwind', was invented by Ives McGaffey in 1869 ?
Who created the first mechanical computer, which proved to be the prototype for future computers?
Who Invented Induction Coil?
Assembly line was invented by
Who discovered Circulatory System?
Who discovered Insulin?
Who invented the hot air balloon?
Who invented the thermos flask?
Who invented radar?
Advertise with Us
RRB ALP & Technicians
Copyright © 2019 Sawaal.com | All Rights Reserved