Taking front panel of machine hood as an instance,both the contents of its punching process flow chart and three-dimension entity die design are introduced in detail, and the function and contents of three-dimension punching process flow chart as well as present die development tendency namely three-dimension entity design are briefly stated, which can be referenced by relevant people.

Application of Sevoflurane Inhalation Anesthesia by Mask in Children Undertaking Lacrimal Passage Probing;

In this article,the author tries to analyze some skills in singing,such as,the resonance of head cavity,mask resounding,the throat-opening,breath-supporting and pronunciation,in order to overcome some difficulties of getting pure and beautiful tone color.