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Rudiment Of Crane
- Mar 15, 2018 -

The tangerines are first used in ancient Chinese irrigation fields,they are the rudiments of boom cranes. In the 14th century, people in Western Europe emerged cranes with human and animal-driven rotary jib cranes. In the early 19th century, a bridge crane appeared; The important parts of the crane, such as shaft, gear and lifting gear, are made of metal materials, and hydraulic - powered cranes is used widely. At the end of 19th century, steam - driven cranes gradually replaced hydraulic - powered cranes. Since the beginning of the 20th century, with the rapid development of the electric industry and the internal combustion engine, various kinds of cranes, which are powered by electric motors or internal combustion engines, have been basically formed.