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1.The bellows seal is essential for maintaining the proper temperature in the furnace.
风箱密封对于保持炉内温度至关重要。
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2. The bellows seal was damaged during the accident, which caused a significant loss of heat.
事故中风箱密封受损，导致大量热量损失。
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3.The engineer carefully inspected the bellows seal to ensure it was functioning properly.
工程师仔细检查了风箱密封，确保其正常工作。