什么是欠火石灰?
欠火石灰是由于煅烧温度低或煅烧时间短,内部尚有未分解的石灰石内核,外部为正常煅烧的石灰。在使用过程中,欠火石灰的存在降低了石灰的利用率,对工程不会带来危害。
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My kind employer soon relieved me of the strain.( )