英语释义
1. the forward extension of the hearth of a blast furnace under the tymp also a similar extension of any smelting hearth
2. a steel furnace having an attachment in the front so as to dispense with the casting ladle
3. a separate receptacle taking the place of a hearth in front of a furnace for receiving molten material flowing out especially to permit settling also a chamber at the end of a tank furnace from which glass is withdrawn for working