primary trunk 中文意思是什麼
primary trunk
解釋
初級中繼線-
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。 -
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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