pre-delay-line re-insertion of subcarrier ==> 延时线前的副载波再注入 pre-deoxidation ==> 预脱氧 pre-determined characteristics ==> 预定性能 ..
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pre-deoxidation process 预脱氧工艺
The measures of controlling aim carbon content and pre-deoxidation, consolidating refining deoxidation and light blow after steel tapping, protective casting, etc.
通过采用控制出钢终点碳和预脱氧，加强精炼脱氧和出钢软吹，做好保护浇注等措施，降低了钢中氧含量。
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