reduction scheme短语¹⁴⁴⁹⁷²⁺² 基本例句 un.归约方案 The nitrogen content of slabs, cleanliness of molten steel, mode of secondary cooling water distribution, roll gap reduction scheme etc. were studied in the line in order to improve slab quality. 以提高连铸板坯质量为研究重点，对该流程铸坯氮含量控制、钢水洁净度、二冷配水模型、铸坯辊缝收缩等进行了全面基础试验工作。 chemyq