In this paper the research results on the preparation of ferri-magnetofluids through colloid chemical methods developed in China are in-troduced, and the applic
After having measured the electric resistanceof carbon firbre reinforced concrete (CFRC) by applying aD. C. current,it was found that the current passing throug
Applying statistics and the orthogonal experiment design method, this paper studies the colloid materials for stope stability simulation and gets some material
On the basis of analysing thecharacter of granite and its polishingtechnology,the authors have manufactureda kind of polishing disk to polish graniteand good re
The ultrafine powders of YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-x</sub> withthe size of 100nm were synthesized by Sol-Gel process using cit-rate as complex and am