介绍了难浸金矿用焙烧法、加压氧化法和细菌氧化法预处理的原理、工业实践及几种方法的技术经济比较。
The paper introduces the principle, industrial practice and comparison of technical economy to pretreat refractory gold mineral through roasting, pressure and bacterial oxidation.
介绍串联电容补偿的技术原理，对并联补偿和串联补偿作了技术经济比较。
The technological theory of series connection compensation condenser is discussed, and connection of the series-parallel is compared.
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