| 摘要 |
The invention relates to a closing mechanism for dispensing molten metal from a hole-bottomed ladle, the closing mechanism containing three at least partially superimposed ceramic plates, each of the plates being provided with a hole, the three ceramic plates being cast in a ceramic mass, said mass being present on at least two sides of the ceramic plates, and the ceramic plates, the ceramic mass, and a metal shell, used as a casting mold, establishing together an integrated unit.
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