Atmospheric corrosion is generally associated with surface storage conditions, or with upper wellbore annuli that may not be fluid-filled.

大气腐蚀通常与地面储存条件或没有被流体充满的上部井筒环空有关。

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As I pointed out in this post, the available Surface Pro storage space to users is significantly lower than advertised, but this is by no means a new issue.

FORBES: Microsoft Tackles Various Surface Pro Concerns, Hints At Battery-Equipped Cover

Adding more disks in a HDD provides more surface area to storage information on.

FORBES: More Storage Means More Disks

And Microsoft went for the iPad, saying its Surface boasted twice its storage.

FORBES: Google, Apple, Amazon, Microsoft: The Holiday Tablets Fight, Fight, Fight!