Supply 3 N, 4N, 5N, 6N metal silicon, polysilicon solar energy (99.9999%), single crystals silicon  and a variety of different size metal silicon powder; supply 5 N germanium dioxide (Geo2) , 6N germanium (Ge) ingot;Complete sets of silicon and germanium production (smelting) equipment and technology. Recovery of germanium materials, ores containing germanium, containing germanium waste----youhen(beijing)