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股份代號 : 000063.SZ 763 - HKEXnews · 2016-04-14 · PTN 指 分組傳送網(Packet Transport Network),指針對分組業務流量的突發性和統計復用傳送 的要求而設計、以分組業務為核心並支持多業務提供、一般採用
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