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what are the reasons for overheating in electrical machines?
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hai friends i have BSNL JTO exam on next month so if any body have model question paper or give preparation tips to my mail id kumar4486@yahoo.co.in this will helpfull for my future .plz & thank u by kumar
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why the frequency and voltage in india is 230v and 50HZ. when compared to USA say 110v and 60 HZ.
