氧化法和中和法是水热制备铁氧体前驱物的两种常见方法。
Oxidation method and neutralization titration are two common ways of hydrothermal prepared ferrite precursor.
结合工程实例，分析了利用集中式空调系统冷凝热制备生活热水的设计方案。
The design scheme for preparing domestic hot water by using condensation heat from centralized air-conditioning system is analyzed with engineering example.
利用集中式空调系统冷凝热制备生活热水不仅具有明显的经济性，而且在节能的同时降低了对环境的热污染。
Using condensation heat from centralized air-conditioning system for preparing domestic hot water has a remarkable economy, and can save energy and reduce thermal pollution to environment.
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