对转炉使用挡渣锥代替挡渣球挡渣出钢进行了试验，挡渣有效命中率可由原来的71。
The experiment to substitute slag-stopping ball with slag-stopping awl to stop slag in tapping is conducted with effective hits percentage raised from 71.
对转炉使用挡渣锥代替挡渣球挡渣出钢进行了试验，挡渣有效命中率可由原来的71。
The experiment to substitute slag-stopping ball with slag-stopping awl to stop slag in tapping is conducted with effective hits percentage raised from 71.
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