一些早期建成的化工企业，由于当时技术的落后，换热网络设计不合理，造成能源的浪费。
In some chemical industry enterprises, for the low technology level at the time they were built, the heat exchanger network is poorly designed which leads to the waste of energy.
一些早期建成的化工企业，由于当时技术的落后，换热网络设计不合理，造成能源的浪费。
In some chemical industry enterprises, for the low technology level at the time they were built, the heat exchanger network is poorly designed which leads to the waste of energy.
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