2013年4月15日星期一

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In 770 BC, China began to use the lost wax method of casting bronze. Central Plains malleable cast iron and cast steel. The chronology (Gregorian calendar) was born (Caesar in 48 BC, Caesar revised calendar called the Julian calendar), Roman civilization to determine the solar calendar and the 24 solar terms. In 770 BC, the Chinese of Hubei Tonglushan Spring and Autumn ancient copper mine sites retained wooden windlass shaft. China appear manufacturing warships workshop. In 700 BC, the Chinese pulley. In 600 BC, the ancient Greeks and Romans into the period of classical culture, this period in ancient Greece gave birth to some of the famous philosophers and scientists christian louboutin sale on the ancient machinery exhibition has made an outstanding contribution. Learn Hilo book states that promote weight theory about the five simple machines (lever, wedge, pulley, wheel and axle, thread), which is the earliest known mechanical theory books.

Greek and Roman woodworking tools has been greatly improved, in addition to the common set of woodworking tools such as ax, bow saw, bow drill, shovel and chisel exhibition spherical drill, pull nails claw hammer, logging double saw and so on.christian louboutin shoes, In this case, the long axis of the lathe and Bicycle bed has been widely used for the manufacture of furniture and spokes of a wheel. Bicycle bed has been extended to use the Middle Ages, and laid the foundation for the exhibition of modern lathe. 500 BC, with the county, Hubei, China tomb retained the Spring and Autumn Period is the most complex and the most exquisite bronzes - the Marquis Yi respect plate and Bianzhong bells 8 65 to muddy casting casting. Late Spring and Autumn Qi woven handicrafts monograph "Kaogongji. The world's first coins punched into the legal system was born in Rome, which is a major achievement of the metal processing, the seeds of modern mass production technology.

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