take a look at this

來源: 地主老頭兒 於 2012-07-26 11:28:31 [] [舊帖] [給我悄悄話] 閱讀數 : (91 bytes)
回答: Q for all your engineers.. 由 jy101 於 2012-07-26 08:25:26

http://wiki.vintagemachinery.org/Three%20Phase%20Frequently%20Asked%20Questions.ashx

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