在平衡密封设计中，筒式釉封采用了新型耐磨金刚砂材料，具有常年无故障性能。
In the design of balanced seal, the barrel type seal has adopted a new-type material of wear resistant corundum to enable no failure for many years.
介绍南沙龙穴造船基地深水河涌水下大砂袋封截的施工经验。
The experience of underwater blocking construction of deep river swell with big sand bags at Longxue Ship-Building Base in Nansha is presented.
现场施工效果表明，双封单卡分段压裂管柱在承压性能及过砂量要求上，能满足要求；
Field application results show that the string of double-sealing and single-stick subsection fracturing can meet the demands of pressurization behavior and sand amount.
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