sch_jack 发表于 2016-1-25 17:00:17

BS PD IEC TR 62271-307-2015

BS PD IEC TR 62271-307-2015 High-voltage switchgear
and controlgear
Part 307: Guidance for the extension of
validity of type tests of AC metal and
solid-insulation enclosed switchgear and
controlgear for rated voltages above
1 kV and up to and including 52 kV

admin 发表于 2016-1-26 16:35:28

谢谢您的分享,金币已奖励!
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