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阐述了目前普遍使用无芯感应电炉的原因。通过对小留量炉体结构分析，得知保温电炉在结构上的新发展，并说明对保温电炉供电能力计算，以求合理选型的重要性。
The reasons for the widespread use of coreless induction furnaces are described. By analyzing the structure of the small furnace, we find out the new development of the insulation furnace and the importance of calculating the power supply capacity of the insulated furnace.