non-metallic ore meaning in Chinese

非金属矿石

The present state and development trend of the ultra - fine comminution technology for non - metallic ores
非金属矿超细粉碎技术的发展现状与趋势
The present state of the ultra - fine comminution technology and equipment for non - metallic ores are reviewed and the existing problems and the development orientation are pointed out
综述了非金属矿超细粉碎技术和设备的发展现状，指出了目前存在的问题和发展方向。