General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
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GB 28396-2012
Scope
This standard specifies the requirements for personnel, equipment and systems, and operating procedures for surface-supplied mixed-gas diving with heliox as the breathing medium. This standard applies to helium-oxygen mixed gas diving with a diving depth of less than 120 m, and also to simulated diving exposed to helium-oxygen mixed gas within 1.2 MPa.
GB 28396-2012 Referenced Document
GB 20827 Criteria of physical examination for commercial divers