Nevertherless, basic oxygen furnace process with heated ladle refining and vacuum degassing may also be considered as acceptable.

不过，带加热钢水包精炼及真空除气的氧气顶吹转炉工艺也可接受。？

Basic structure of RH furnace multifunctional oxygen lance, composition of control system, main functions and control process of the oxygen lance are introduced, and control index is given.

重点介绍rh炉多功能氧枪的基本结构，控制系统构成，氧枪主要功能、控制流程等，并给出了控制指标。