Mingder Mineral stone color sorter machine, mineral ores color sorting machine--Hefei Mingde Optoelectronic Technology CO., LTD Welcome to test our machine if needed !!! www.hefeimd.com/en Moible/whatsapp: 008613966725592 Skype: dianahongsmile Tel: 0086-551-62578095 Email: dianahong@hefeimd.com