A.0.5~1.0 B.1.0~1.5 C.1.5~2.0 D.2.5~3.0
A.1/3 B.1/4 C.1/5 D.2/3
A.提前吹氧 B.加碳粉增碳 C.提前造渣,適時(shí)吹氧助熔 D.提高溫度