Mingder quartz ore color sorting machine, minerals color sorter equipment - Hefei Mingde Optoelectronic Technology CO., LTD www.hefeimd.com/en mingder.en.alibaba.com Mob/whatsapp: 008613966725592 Skype: dianahongsmile Email: dianahong@hefeimd.com Tel: 0086-551-62578095