天然矿 meaning in Chinese

trona

The metallurgical properties of several sinters and natural ores for shuicheng iron and steel co . , ltd . were investigated
摘要系统地研究水钢烧结矿及天然矿的冶金性能。
Our natural mineral salts from the thousand - meter deep jurassic layer are pure , natural , free of pollution , and safe
本公司的千米侏罗纪地质层天然矿盐，纯净、天然、无污染，安全自然。
In the two domestic ores , the lanping ore is better than the qingzhen ore in comprehensive metallurgical properties while the domestic ores are generally inferior to the imported ores in comprehensive metallurgical properties
在两种国产块矿中，兰坪块矿的综合冶金性能比清镇块矿好；国产天然矿的综合冶金性能比进口天然矿差。