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.
For years, the bench press world record crept up slowly and steadily. In the 1950s, Canadian Doug Hepburn became the first man to bench 400, 450, and 500 pounds. In 1957, Hepburn told Muscle Power magazine that a 600-pound bench press was possible, but it wasn't until 1967 that Pat Casey cracked that barrier.