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交变电磁场是针对煤粉气流在着火过程中有关特征发生变化：煤粉颗粒的半导电性；
The electromagnetic filed influence the ignition process on that: pulverized coal particles as semiconductor;
youdao
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交变电磁场是针对煤粉气流在着火过程中有关特征发生变化：煤粉颗粒的半导电性；
The electromagnetic filed influence the ignition process on that: pulverized coal particles as semiconductor;
youdao