unusual structure
3.The calculation model can be used to optimize the structure and size of the rear horsehead, solve the problem that the structure and size of the rear horsehead affect the kinematic parameters of the polished rod and the torque factor, as well as the performance of the unusual shape beam pumping unit.
5.The rare earth-iron intermetallic compounds of SmTiFex with x ranges from 8 to 11, was synthesized by are-melting technic. We found that they crystallize in the ThMn12-type tetragonal structure, 14/mmm. We report here the crystallographic and magnetic properties of Sm(Ti, Fe)12 and Gd (Ti, Fe)12. Unusual uniaxial magnetocrystalline anisotropy was observed in Sm(Ti, Fe)12 compounds.

