近一、二十年来，SF_6气体在高压电器领域得到了广泛应用，从而大大提高了这些设备的技术性能和整体质量。
In recent 10-20 years, SF6 gas has been widely applied in the field of HV electrical apparatus, thus the technical performance and entire quality of these equipment are greatly raised.
近一、二十年来，SF_6气体在高压电器领域得到了广泛应用，从而大大提高了这些设备的技术性能和整体质量。
In recent 10-20 years, SF6 gas has been widely applied in the field of HV electrical apparatus, thus the technical performance and entire quality of these equipment are greatly raised.
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