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ABBREVIATION for pounds per square inch, absolute 磅／平方英寸，绝对压力
Containers used for transporting liquid nitrogen at pressures greater than 25 psig (40 psia) need to be designed, manufactured, and tested to DOT specifications.
用于运输压力大于25 ps ig (40 psia)的液态氮的容器需要按照DOT规范设计、制造和检测。
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