The present status of application and research on pretreatment of refractory gold ore with ultra fine grinding is briefly introduced in this paper.
简述了超细磨预处理难浸金矿石的应用研究现状。
The relation between power electronics and micro-electronics, present status and future trends and application of power electronics technology are described in this paper.
本文介绍电力电子技术与微电子技术的关系及电力电子技术的发展趋势及应用。
The present status abroad, domestic level and its application of filmatic bearing oil were described. The artificial obstacle about native production and hope in future were analysed.
介绍了油膜轴承油国外现状和国内水平及其应用简况，分析了油膜轴承用油国产化的人为障碍及今后国产化的希望。
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