发明授权
US3684262A Glass furnaces 失效
玻璃炉

Glass furnaces
摘要:
A glass furnace having its side walls chamfered at the top within the range of more than 30* to 45* to the horizontal from their inner vertical face over a substantial portion of the width of the top of the walls, whereby the resultant chamfered surface includes the flux line when the furnace is in use.
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