To prevent cryogenic liquids or cold gas from being trapped in piping between valves, equip the piping with pressure-relief devices.

To prevent cryogenic liquids or cold gas from being trapped in piping between valves, equip the piping with pressure-relief devices.是什么意思,To prevent cryogenic liquids or cold gas from being trapped in piping between valves, equip the piping with pressure-relief devices.翻译
http://www.srjinyu.com/enexample/003ddacd45dc38e81d7b0da1c24014a8.html