Zhengzhou high tech Zone, China[email protected] 7*24 For you
0. mine spoil metal-ore extraction randomly mixed earthy materials artificially deposited as a result of either surficial or underground metal ore mining activities a type of mine spoil. sw glossary of landform and geologic terms. ore grade is a measure that describes the concentration of a valuable natural material such as metals.
If you want to learn about our products , please call or write mail consultation.