N-COUNT A kiln is an oven that is used to bake pottery and bricks in order to make them hard. 窑
The rules would cover 163 kilns in 35 states.
此项法规的管辖范围包括分布在35个州的163个水泥窑。
The gas will already be concentrated and pure if the kilns work the right way.
只要石灰窑按照正确的方法运作,产生的将是浓缩和净化后的二氧化碳气体。
The kilns were used to process silver and lead ore and are no longer in operation today.
这只是建于1876年的一个老窑,这个窑炉是用来锻炼银子和铅的,今日已不再使用。
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