In recent years, the rapid development of the economy has brought some pains to the environment. After pollution such as waste gas, waste water, waste residue and noise, light pollution has entered people's field of vision in its unique form. At present, light pollution has become one of th…

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Company details: 

1. Qingdao Perfectlnter national trade co. Ltd is the ministry of foreign trade of YANTAI HONGCHEN BRAKE Co., Ltd specializing in producing brake discs, drums, pads and steel castings&period…

The kinetics of dissolution of gold and silver in cyanide solution are thought to be mainly controlled by diffusion. However, there are different opinions on the reaction mechanism of gold and silver.…

In recent years, LED lighting products that promote plant growth have attracted attention. These led bio-lighting products are known as plant factories. Giving a little sunshine is a ridiculous word between people. However, in the field of bio-illumination, whether it is plants, animals, or eve…

With the rise of the Internet and product differentiation, more and more home appliance hardware has been "pipelined" in the past few years. If the hardware is lost without innovation, the brand's pricing power will become smaller and smalle…