primary trunk 中文意思是什麼

primary trunk 解釋
初級中繼線
  • primary : adj 1 第一的,最初的,初級的;初等的;基本的;基層的。2 主要的,為首的,第一位的。3 原始的,根本...
  • trunk : n 1 樹干 (opp branch); 軀干,身軀。2 本體,主要部分;(河的)主流;(鐵道等的)干線;大血管,大...
  1. Before the 1990s, the digital transmission equipment was based on the technical standards of plesiochronous digital hierarchy ( pdh ). in order to connect the switch to pdh transmission equipment, the switch side needs lots of terminal equipment of the primary rate, i. e., 2048 kbits ( 2m ) switching terminal circuits in compliance with itu - t standards ( e. g. s1240 s dtm trunk module and axe10 s etc module ) and ansi - standard - based 1544 kbits ones

    在90年代初期以前,數字傳輸設備是建立在pdh ( plesiochronousdigitalhierarchy )技術標準上,為了連接交換機到pdh傳輸設備上,在交換機側需要大量的符合基群速率的終端設備,即符合itu - t標準的2048kbits ( 2m )交換終端電路(如s1240的dtm中繼模塊, axe10的etc模塊)和符合ansi標準的1544kbits交換終端電路等。
  2. The effect of combined treatment of sanchaling capsule and nerve trunk injection with adriamycin on 105 cases of primary trigeminal neuralgia

    阿黴素神經干注射聯合三叉靈膠囊治療原發性三叉神經痛105例臨床觀察
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