作者: lvboodvl 标题: IEEE standard for frequency aspects
RT~ thx!
附件: IEEE Standard Definitions of Physical Quantities for Fundamental Frequency and T.pdf (2017-2-11 13:53, 917.96 KB) / 下载次数 2 https://test.txrjy.com/forum.php?mod=attachment&aid=MzEyMzU4fDBlYTNlNzcyfDE3NTkwMzAwMzd8MHww