S1720-52GWR-PWR-4X-E (48个10/100/1000Base-T以太网端口,4个万兆SFP+,PoE+,含license,370W POE交流供电) S1720-52GWR-PWR-4X-E (48个10/100/1000Base-T以太网端口,4个万兆SFP+,PoE+,含license,370W POE交流供电)
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