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。
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。
Retrogradation characteristic of instant rice noodles during storage was studied.
研究了方便米粉在贮藏过程中的老化特性。
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