外燃式热风炉因其结构及内衬耐火材料的特点，如果凉炉不当将导致热风炉内衬在凉炉过程中产生严重的结构性破损。
Because of its special structure and refractory characteristics, the hot stove's inner lining would be seriously damaged if it were not cooled in a proper way.
外燃式热风炉因其结构及内衬耐火材料的特点，如果凉炉不当将导致热风炉内衬在凉炉过程中产生严重的结构性破损。
Because of its special structure and refractory characteristics, the hot stove's inner lining would be seriously damaged if it were not cooled in a proper way.
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