已经有次观看 jwm在2015-10-10发布

Channel：Tungsten 标签： Documentary  Chinese  treasure  Tungsten 

简介：In 1908 our country found in West Huashan tungsten mine. 1974 China tungsten concentrate to enter the international market. In the nearly 80 years, China's reserves of tungsten, tungsten concentrate production and international trade are accounted for first in the world, China's tungsten concentrate export occupies the nonferrous metal products export in the first place, really can be described as a national treasure.