| 摘要 |
A ceramic body includes a disk-shaped mold cavity in its upper part and a slag retention chamber underneath; these chambers are interconnected by a duct extending downward from the bottom of the mold and being continued by a ceramic tube traversing centrally the retention chamber and ending near the bottom thereof. A reversal chamber is excentrically disposed under this tube end, and diametrally thereto ends the feed duct.
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