ups ИБП datacenter rapid papid7 инвертор battery data center data centre цод ЦОД projects project management pmbok iot аккумуляторные батареи АКБ sodium nickel chloride batteries salt batteries kirchhoff's voltage law (2nd law) kirchhoff's current law (1st law) ohm’s law victron energy uptime institute toshiba scib infrastructure engineering 9sx ups eaton 0ю4кв фэп iec 62040-3:1997 ДСТУ акустика серверная ибп rapid papid 7 apsx 3024 apsx 6048 ДБН tia 942
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