The aircraft carriers of the Nimitz Class are the largest warships currently in service in the world. At around $4.5 billion each, these carriers are the most expensive ship on this list. The ten ships of this class help the United States flex its military muscle around the world.
Introduction to China Jaw Crusher. Jaw crushers machine are invented in 1858 and first widely applied in road paving and then in mines.
The worldâs first bubble gum is Dubble Bubble. It was invented in 1928 by Walter E. Diemerâan accountant at Fleer Company. After his retirement, Diemer admitted that the recipe was discovered by accident. The company founder, Frank Fleer in 1906, attempted to create a chewing gum which he called Blibber Blubber.