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Негізгі бет Тәжірибелік нұсқаулар және стиль အားပြည့်တဲ့ဘက်ထရီတစ်လုံးအချိန်ဘယ်လောက်ကြာအသုံးပြုလို့ရမလဲ?//how to calculate battery backup time
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#diy
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#ups
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