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.
1 By 1888, an Adams' chewing gum called Tutti-Frutti became the first chew to be sold in a vending machine. 2  The machines were located in a New York City subway station. 3  In 1899, Dentyne gum was created by New York druggist Franklin V. Canning. 4  In 1906, Frank Fleer invented the first bubble gum called Blibber-Blubber gum.