(多选题)7: 供热管网水力计算中，要选定各管段的直径需根据供热管网的各管段信息包括（ ）
A: 计算流量
B: 最大流量
C: 估算比摩阻
D: 测量比摩阻
一、选择填空：阅读下面的对话或句子，从A、B、C三个选项中选出一个能填入空白处的最...
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