+86-0477-8391981
Interactive information
News and information
Interactive information Interactive information
Interactive information
集鍋爐研發、生產、銷售、安裝、售后、
維修為一體的現代化制造企業
Industry Information
Industry news
Current location:Home > Interactive information > Industry Information

Why is coal charcoal black gold

Release date:2019-09-27 | Number of views:541
        Coal is a solid combustible mineral that was gradually formed by complex biochemical and physicochemical changes experienced by ancient plants buried underground.

        Coal is known as black gold and the food for industry. It has been one of the main energy sources used by the human world since the 18th century. Since the beginning of the 21st century, although the value of coal has not been as high as before, coal is still an indispensable source of energy for our human production and life for a long time to come, The supply of coal is also related to the stability of the development of China's industry and even the entire society, and the safety of coal supply is also an important part of China's energy security.






最新久久中字无码_自拍偷拍中文字幕_亚洲日本va一区二区三区_虐待人妻操久久久