MINGDER minerals ore sorting equipment, high efficient color sorter for sorting various minerals: calcite, calcium, fesdspars, quartz ore etc - Hefei Mingde Optoelectronic Technology CO., LTD www.hefeimd.com/en Mob/whatsapp: 008613966725592 Skype: dianahongsmile Email: dianahong@hefeimd.com Tel: 0086-551-62578095