The paper analyzed influence of temperature upon metatitanic acid density and has found a correction method for densitomeler using re-gression equation of temperature and density,they determined and verified the empirical constant for conversion equation of the slurry demsity and concentration with physical and chemical method.

Significance of hysteroscopic examination in the diagnosis of abnormal menstruation after terminations of pregnancy;

The incidence of abnormal menstruation are as follows:abnormal menstrual cycles,abnormal menstrual period,the amount of abnormal,and the incidence of dysmenorrhea of sub-group:13.