Junior high school project

Project Title: Development Phase of the Junior Middle School Project for the C01-19 Block in Zhennan Community, Chuansha New City, Shanghai Stage of Progress: Construction Preparation Period: October 2011-November 2012 Major equipment: cranes, excavators, fire

Silver mining

Our silver mine type and occurrence diversity, its mining method is also different, but together, in order to pit mining, and few open-pit mine.
The pit mining hills are generally developed by vertical shafts, while the shallow surface minera