hgundas 发表于 2020-4-24 04:57:36

IEC 61857-21:2009 Electrical insulation systems –



IEC 61857-21:2009
Electrical insulation systems – Procedures for thermal evaluation –
Part 21: Specific requirements for general-purpose models – Wire-wound
applications

admin 发表于 2020-4-26 09:41:38

谢谢您的分享，金币已奖励!
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