Mingder Cobblestone ore color sorter machine, feldspars and quartz ore color sorting machinery, color separator machine--Hefei Mingde Optoelectronic Co., LTD www.hefeimd.com/en Mob/whatsapp: 008613966725592 Skype： dianahongsmile Email: dianahong@hefeimd.com Tel: 0086-551-62578095