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These models are susceptible to cracks, corrosion, and use due to growing old and severe operational environments. A lot more than 80% of kit failures stem from tube hurt inside heat exchangers, posing substantial basic safety hazards.깨끗?�고 ?�락???�설, ?�문?�인 ?�비?? 그리�?친절??매니?�?�들�?구성???�???��