1. Loose sand or ore used to line the hearth of a reverberatory furnace in preparation for pouring molten metal. 
   涂炉膛材料为倒入熔化的金属作准备的用来修整反射炉炉膛的松散砂子或矿渣
2. To line the hearth of(a reverberatory furnace) with loose sand or ore in preparation for pouring molten metal. 
   涂（炉膛）为倒入熔化的金属作准备而用松散的沙子或矿渣涂（反射炉的）炉膛
3. hearth efficiency,hearth specific productivity 
   床能率
4. A fire crackled on the hearth. 
   火在炉中噼啪作响。
5. A place next to a hearth. 
   靠近壁炉的地方

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