railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Electronic Mechanic Computers Computer Hardware and Networking

ଅନଲାଇନ୍ UPS ର ଆବଶ୍ୟକ କଣ 

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କେବଳ ବ୍ୟାଟେରୀ
2
ଉଭୟ ରେକ୍ଟିଫାୟର୍ ଏବଂ ଇନଭର୍ଟର
3
କେବଳ ରେକ୍ଟିଫାୟର୍
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କେବଳ ଇନଭର୍ଟର
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