7.Along with the development of industrial of plating/curry/antisepsis and dye matter, more and more waste water containing heavy metal ion was let out.
9.RESULTS The average medical treatment room area is only 27.89 m2 in 22 nursing home, lacking the personnel of medical and antisepsis, lower technique arrangemnte;
10.Characteristics:durabce,high temperature resisting,high voctage resisting,antisepsis and envicromentally protective.Getting rid of poor factors(non-cleaness,aging,unstasicity,disjoints and blow up)caused by soft rubber joints.