surface casing

基本解释

But I find it a sign of the surface casing is an inverted comma , would …
但我发现它机壳表面上的标志是一个倒逗号，请问…
Prior to setting surface casing, the cellar also takes mud returns from the well, which are pumped back to the surface mud equipment.
在下入表层套管且注水泥之前，方井同样接受从井眼内返出的、必须被泵回到地表泥浆设备中的泥浆。
www.infopetro.com.cn
This paper presents the design of surface casing drilling in Shengli Oilfield, as well as development of main tools and the field application in Well Kendong-341.
详细介绍了胜利油田表层套管钻井技术整体方案设计、主要工具的研制及在垦东341井的现场试验情况。

As you can see, the device looks similar to the Surface RT, including the same "VaporMg" casing and built-in kickstand, and it also boasts a 10.6-inch display with a 16:9 aspect ratio.
ENGADGET: Microsoft confirms Surface with Windows 8 Pro pricing: starting at $899 for 64GB version, shipping in January