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分析了冲管参数和冲管系统接入位置对汽水管道系统的安全性影响。
The security influence of the flushing pipe parameter and the flushing pipe system on-position for steam-water piping system are analyzed.
结论肝素冲管是预防导管相关性并发症的有效手段，且没有增加出血的危险，安全性较好。
Conclusion the current evidences show that heparin flushing is an effective and safe way for preventing catheter-related complications and it does not increased the risk of bleeding.
钻井水龙头由于结构设计的原因，冲管盘根在钻井过程中不断磨损，特别是在高压泥浆的作用下，盘根密封常常被破坏。
The wash pipe packing of drilling swivel showed wear-and-tear continually in drilling process due to its structural design. The packing assembly was often torn by high pressure mud.
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