fine ore短语¹⁴⁴⁹⁷²⁺² 基本例句 n.粉矿 The experiment of smelting HCFeCr was performed with SRC chromic ore pellets in order to reduce cost of production, increase economic benefit and look for ways of using chromic fine ore. 为了降低生产成本、提高经济效益及探索铬粉矿的利用途径，进行了 SRC铬球团矿冶炼高碳铬铁的试验。 cnki