吸十
2.The amount of Cu2+ exchanged on the Nafion membrane decreases, as a result, the absorption signal of Cu2+ decreases, A linear relation between the decrease of absorbance and concentration of cephradine added is obtained in the range of 1.5 × 10-6-1.0 × 10-5mol / L, The relative standard deviation for ten parallel determinations is 2.0 %.
3.The author finally puts out his personal opinions and suggestions for the improvement of hammer mill on the subjects such as manufacture, assemblage, operation, management, technology,aspirating system, transmission, automatization, structure of machine and further study of grinding theory.
4.The noise constantly is not affecting our normal life, for example;Just repaired the family, to the quiet at dead of night building about the water pipe noise, has caused you to be unable normally to rest,the senior citizen, the neurasthenia, the heart was not specially good and so on the community, was is unable to rest, the saint porch company produced "the down-flow pipe sound insulation wrap" the product, fundamentally has solved this problem, this product has used the advanced sound insulation, the sound absorption, the material,passed through the specialized technical many years research development, and experimented after the Beijing ten plots different levels owner, the sound-insulated effect achieved above 90%,satisfaction rate reached above 99%, did not have an example suit,received the owners universal welcome.
