It shows that the on-line blockage process with expansive cylinder has the advantages of high safety and low construction cost compared with several other on-line blockage processes.
英
美
释义
摘要通过对几种不停输封堵工艺的特点进行对比,说明了膨胀筒式不停输封堵工艺具有安全性好、施工成本低的优点。
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