wear value
2.The calculating example shows that under a certain load,（1）roughnesses of the rubbing surfaces gradually reaches a constant——a equilibrium roughness, when the wear is in a three-body wear process; （2）corresponding to a certain mean square root value of the wear abrasive size, the equilibrium roughness is the largest.
4.Based on Manson-Coffin concept,the materials selection for jaw crusher plates onthe purpose for wear-resistance is suggested that the materials with higher(HV.■)~2 value isbetter for harder abrasives and higher HV for softer abrasives.
6.Women in Lvliang, Shanxi Province bring about a new method of chain poverty elimination with one household as a unit and one family leading several as chains to shed off poverty continuously. As a result, the value of the circulating lump sum fund keeps appreciating, for nine years the return remains high at 97 percent and more than 40,000 poor families now have enough to eat and wear.
