Low level heat energy is recovered from municipal wastewater using wastewater source heat pump.
利用污水水源热泵，可回收城市污水的低位能源。
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。
It's proved that the cause of high threshold of thulium laser is the heat-distribution particle at low laser energy level.
理论和实验结果都表明引起铥激光器高阈值的主要原因是温度引起的激光下能级的热分布粒子。
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