塞煤
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The cause of coal plugging and its influence on boiler running are analyzed.
分析了锅炉煤仓塞煤的原因和煤仓塞煤对锅炉运行的不利影响。
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A cheap FD - 2 plugging agent was prepared with the thin coal ash as main material.
以细煤灰为主剂，研制了一种廉价的FD - 2型封堵剂。
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