Taiwan-style technical Chinese. Mainland tech writing usually keeps the abbreviation: 千兆位 (qiānzhàowèi) or just Gb. 位元 (wèiyuán) means 'bit'; in Mainland usage you more often see 比特 (bǐtè, transliteration) or just 位 (wèi).
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Found in Taiwanese networking specs and translated technical documents. In a Mainland context you're more likely to see 千兆比特 or simply Gb.
