“economic specific frictional head loss”的概念、定义、翻译、参考文献-科学参考

单词	economic specific frictional head loss
释义	economic specific frictional head loss Encyclopedia 工学长距离输送热水管网释 economic specific frictional head loss经济比摩阻用技术经济分析的方法，根据供热系统在规定的补偿年限内年总计算费用最小的原则确定的比摩阻。
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