作为超压保护装置。
超压保护装置主要是为油田井下压裂施工仪表车而设计的。
The overpressure protection equipment is mainly designed for hydraulic fracturing in oil field.
核2，3级辅助系统安全阀是核电站----回路辅助系统的超压保护装置。
The safety valve of grade 2 and 3 auxiliary system is the protective device against the overpressure in the auxiliary system of the first loop.
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