按GB/T12022-2014要求,SF6新气质量指标纯度()。A、≥99%B、≥99.9%C、≥99.5%D、≥95%

按GB/T12022-2014要求,SF6新气质量指标纯度()。

  • A、≥99%
  • B、≥99.9%
  • C、≥99.5%
  • D、≥95%

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