Mingder Double belt type Quartz ore color sorter machine, CCD mineral stone color sorting machine with fantastic sorting performance--Hefei Mingde Optoelectronic Technology CO., LTD www.hefeimd.com/en Mobile/whatsapp: 008613966725592 Skype: dianahongsmile Tel: 0086-551-62578095 Email: dianahong@hefeimd.com