线路截断阀是管道安全运行的重要保证。
The line block valves are of vital importance for the safety operation of the pipeline.
根据输气管道安全的需要，对干线快速截断阀压降速率设定值的确定方法进行了研究。
For the safety of gas transmission in long distance pipeline, the method regarding how to get the proper value of pressure drop rate for the fast block valve on pipeline is studied.
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