kiln filling

例句：

1. 1.The kiln was filled with a mixture of clay and sand.
   窑炉里装满了泥土和沙子的混合物。
2. 2.The kiln filling is essential for the firing process.
   窑炉填充物对于烧制过程至关重要。
3. 3. The kiln was filled with coal, ready to produce bricks.
   窑炉里填满了煤炭，准备生产砖块。