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2. (2) G. Christophorou, J.K. Olthoff, and D.S. Green:“Gases for Electrical Insulation and Arc Interruption: Possible Present and Futhure Alternatives to Pure SF6”, NIST Technical Note 1425, pp.2-5 (1997)
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4. Current-zero behaviour of an SF6gas-blast arc. II. Turbulent flow