Allows faster, safer run-in using packing element that prevents swab-off forces.

—使用的密封材料可以避免抽吸力，更快、更安全地下入工具。

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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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Provides increased clearance and locked construction for faster, safer run-in with packing element locked against swab-off forces.

—间隙较大和锁定结构，方便快速、安全下入，密封元件避免抽吸力。

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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