Methods:According to the formative characteristic of pear, the canine tooth instant exploding apparatus was applied in the research.
方法：根据珍珠的形成特性，应用犬齿瞬间爆裂装置进行研究。
2
Use two freedom vibration theory, base on impact has instant motion characteristic, use puncher example, study the isolating vibration design of impact base.
应用两自由度振动理论，根据冲击具有瞬态运动的特点，以冲床为例，研究冲击基础的隔振设计。
3
Retrogradation characteristic of instant rice noodles during storage was studied.