细煤粉
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ultra-fine coal dust 超细煤粉
coal fine dust 煤粉尘
fine coal dust
细煤尘
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The transformation of oil fired annealing oven into fine coal fire one was introduced. The installation of controlling smoke and dust annealing are described also.
介绍了铸件退火炉由油炉改为煤粉炉的技术方案及烟尘治理装置。
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