flowrate of bottom gas(Desired steel compositions and temperatures can be achieved by varying the type and flow rate of the bottom gas. 理想的钢水成分和温度，可以通过改变底吹气体种类和流量的方法得以实现。)
bottom gas flow rate(The bottom blown gas results in improved mixing of the metal bath, the degree of bath mixing increasing with increasing bottom gas flow rate. 底吹气体可以改善金属熔池的混合底吹气体流量越大，熔池混和程度越高。)
