additional heating surface的用法和样例：
- Preventing additional heat loss is crucial.
- The corrosion problem is less in regenerative plants since the heating surface is provided by stones.
- In retrofit, measures of not varying the main body and changing over to use membrane economizer for enhancing wear-resistant capability of the heating surface have been taken.
- She says rescuers will first try to prevent additional heat loss by placing extra covering around a victim's chest, head and neck.