A New method of rock drillability classification for impregnated diamond drilling is recommended. The essence of the method is comparing the area of the slots c
The productivity of China’s nonferrous metals industry during 1980-1990 has been analysed. The important factors which constrain the productivity of the nonfer
This paper summarizes the production of the platinum electrode of tantalum clad silver. Ta(Ag). It clarifies the determination of the design parameters for the