... -alone, parallel connection machine or machine series in such specs as Φ50, Φ75, Φ100, Φ125, Φ150, Φ200, Φ250, ... 500 and Φ660.Fine sand, less than 37μm, in gangue can not be used as dam materials during selecting mine ... section full of clean water, which can be used for calling back of water. In the process ... filling work so that to solve problems such as leaking mine, sink and overproof water discharged. ...