MINGDER mineral ore color sorter equipment, ore stone color sorting machine for sorting calcite, calcium, potash feldspars, diamond, manganese etc Hefei Mingde Optoelectronic Technology CO., LTD www.hefeimd.com/en Mobile/whatsapp: 008613966725592 SKype: dianahongsmile Tel: 0086-551-62578095 Email: dianahong@hefeimd.com