The security zone is divided into vertical and horizontal sections with professional industrial control equipment and software security, as shown in figure 2.
对安全区域划分的纵向各层和横向各区配备专业的工业控制安全设备和软件进行安全防护，如图2所示。
Radial horizontal well is the most complicated one in horizontal well series, it has a major horizontal section and one or several branch sections.
辐向水平井是水平井系列中的高难度井，它除了有一段水平井段外，还有另外一条或多条分支井段。
The diffraction hilly structures widely develop on the top of Middle Triassic and Lower Triassic in the seismic horizontal stacking time sections in the central part of Sichuan Basin.
在四川盆地中部的地震水平叠加时间剖面上，中三叠统及下三叠统顶部广泛发育绕射丘状结构。
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