Investigated the effect of an addition of CaF2 on the crystallization of a glass-ceramic with abrasion resistance. X-ray diffraction, differential thermal analy
The principle and structure of hydro-viscous drive(HVD) set is introduced. Through theoretical analysis of the HVD set start-up steadiness, the conclusions were
The friction characteristics of rock damage plane have important impact on the stability of block structure formed after the stratum is broken. The mechanics pr