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並前往https://www.polyphaser.com/surge-protector-3-pair-100base-t-ethernet-48vdc-ix-2h1l1dc48-ig

Outdoor Twisted Pair Lightning Surge Protector ... - PolyPhaser

... RS-232/422/485, 1 Pair 48Vdc, Isolated DC Ground, UL 497B PolyPhaser IX-2H1L1DC48-IG data line lightning surge protector (also known as lightning surge ...

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