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Copper coexisted with bronze, and brass appeared. The site of the Lin family in Dongxiang, Gansu Province, unearthed a bronze knife of Fan Zhu; Two red and bronze medallions with holes were found at the Dachengshan site in Tangshan, Hebei Province; A fragment of a bronze container containing 7% tin was unearthed in Longshan City, Wangchenggang, Dengfeng, Henan Province; A complete copper bell was unearthed in the cemetery of Xiangfen Tao Temple in Shanxi Province, which was red copper; Two brass cones were unearthed at the Sanlihe site in Jiaoxian County, Shandong; Brass fragments unearthed in Yangjiaquan, Qixia, Shandong Province. The largest number of copper products found is the Qijia culture in Gansu, Qinghai and Ningxia, and there are several cemeteries unearthed knives, cones, drills, rings and copper realms, some are bronze, some are red copper.

In terms of production technology, some are forged, and some are cast with fan, which is relatively advanced.

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Paraffin is a mixture of hydrocarbons, so it does not have a strict melting point like pure compounds. The so-called melting point of paraffin wax refers to the temperature at which the stagnation period occurs for the first time on the cooling curve of the paraffin specimen that has been cooled and melted under specified conditions. All kinds of wax products require paraffin wax to have good temperature resistance, that is, it does not melt or soften and deform at a specific temperature.

According to the conditions of use, the region and season of use, and the difference in the use environment, commercial paraffin wax is required to have a series of different melting points.

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The first ride is four horses, there is a shed on the car, and the emperor is sitting. The two chariots and horses are made of bronze castings, and their size is proportional to the actual size, and they are extremely delicate. There are also a lot of gold and silver ornaments on the horse, which are painted throughout.

The second horse, long and tall, can be said to be the largest and most complex bronze vessel ever excavated. By the end of the Eastern Han Dynasty, ceramics had been greatly developed, and their role in social life became increasingly important, thus further squeezing out daily bronze vessels from life. As for weapons, tools, etc., iron tools had long been dominant at this time.

The bronzes of the Sui and Tang dynasties were mainly all kinds of exquisite bronze mirrors, which generally had various inscriptions. Since then, it can be said that there has been no development of bronze ware other than bronze mirrors.