| 摘要 |
<p>The present invention relates to a stopper installed to be lifted in a container processing molten steel and opening and closing a molten steel outlet formed in the container. The stopper comprises: a stopper body extended in a longitudinal direction; and a stopper head connected with a lower portion of the stopper body and of which an outer diameter is widened from the lower portion to an upper portion and where a plurality of dimples are formed on an outer surface. The stopper is capable of reducing attachment of an inclusion.</p> |
