Beijing Kaiying Ao Sheng Company

Bitumen is a hydrocarbon material with high viscosity and colloidal structure, and black to dark brown color and is completely dissolvable in Carbon D

Iron ore is an important commodity currently in high demand due to population and infrastructure growth in developing countries. Specifications We su

Manganese is one of the most necessary strategic minerals, used in the metallurgical industry for manganese steels. Its never found in nature in nativ