Since the gas bag is added, the pressure increase within the hydraulic chamber is very slight when the string collar passes through the packing element.

由于增加了气囊，管柱接箍通过胶筒时，液压腔内的压力升高很少。

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In order to solve the problem concerning the contact-sealing theory for the common packing element, the design theory of "complete anti-extrusion" is put forward.

针对普通胶筒密封遵循接触式密封理论所存在的问题，提出了封隔器胶筒“完全防突”的设计理论。

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Packing element shoulder protection and large locking structure improves the properties of the packer.

封隔元件肩部保护结构和定位大锁块的采用，提高了封隔器的密封、坐封和解封性能。

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Jobs was a workaholic obsessed with every screw inside the computer, how the customers experienced the product packing and every element in the marketing of the product.

FORBES: Inside Apple #2