| 摘要 |
A blast furnace trough with a lining to conduct molten metal from a blast furnace or the like to a molten metal runner or the like, has a metal trough (10) with a consumable one-piece prefabricated lining (20) therein which is formed from a refractory base material in several layers (21,22,23) of different densities and which are combined by physical force. <IMAGE>
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