liuxilin1215 发表于 2013-12-3 07:25:42

IEC 60027-3-2002

IEC 60027-3-2002 Letter symbols to be used in electrical technology – Part 3: Logarithmic and related quantities, and their units


admin 发表于 2013-12-3 10:36:59

谢谢您的分享，金币已奖励！
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