The powder injection molding technology, features and application in materials such as refractory tungsten alloys and hard alloys are reviewed in this paper.
本文阐述了粉末注射成形技术及其特点，以及在难熔钨合金和硬质合金及其它材料中的应用。
2
The basic principle, character, research and application situation of pretreatment technology of refractory gold ore are summarized in this paper.
综述了难处理金矿石预处理工艺的基本原理、特点和国内外研究与应用状况。
3
Cometabolism with microorganism is an effective method to deal with the refractory organics in terms of economy and technology.