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  • curprev 14:1214:12, 24 September 2011Kili talk contribs 871 bytes +871 Created page with "==Maana== Ufanisi nishati ni hali ya kutumia nishati kwa kudhibiti kiwango cha nishati inayopotea ili kutopoteza ama kupoteza kiwango kidogo sana cha nishati. ==Faida== Katika za..."
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