direct-reduction process [冶] 直接还原法
shaft furnace direct reduction process 竖炉直接还原法
bl direct reduction process bl法直接还原
wiherg direct reduction process 维伯尔直接还原法
coal based direct reduction process 煤基直接还原
fluid iron-ore direct reduction process 铁矿流化直接还原法
direct iron reduction process 直接铁还原过程
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