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Bearing ancient history
by：Waxing
2020-09-06
Ancient Chinese working people four thousand years ago in the production and life began to understand the effect of rolling element, use log support major objects moving forward;
To reduce the friction between the object with metal tile.
For example, there are numerous ancient buildings in Beijing city 850 USES a large stone and wood, the raw materials come in thousands of miles away in the cloud, guizhou, sichuan and guangdong two lakes and zhejiang, fujian and other places in the mountains of collection and each stone weighs several tons, wood trunk diameter of more than 1 meters, 10 meters high, how over the mountains and rivers, lakes shipping arrived in Beijing, in addition to the part of waterway transportation, the vast majority of the rolling element, for land transportation.
The spring and autumn period and the warring states period before they invented the chariot, chariot wheel hub is made of the principle of bearing, and modern bearing is as the bike arises at the historic moment.
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