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See Chinese contents: GB/T 34530.1-2017 GB/T 34530.1-2017: Valve for cryogenic insulated cylinder -- Part 1: Pressure regulating valve
This part of GB/T 34530 specifies the terms and definitions, basic types, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, product certificate, batch inspection quality certificate of pressure regulating valves for cryogenic insulated cylinders.
