trunk channel 中文意思是什麼
trunk channel
解釋
主通道-
Chongqing expressway networking toll data communication network cotains 2 - ring and 8 - ray network structure based on expressway physical structure, setting up a trasmission trunk layer of sdh stm - 4 ( can be up - graded to stm - 16 ), and channel protection business entry layer consisting of sdh onu / olt stm - 1 ( can be up - graded to stm - 4 ). data exchange layer, through ip route exchange network above sdh network, forms 3 - level computer network structure of account settlement center - road section management company - toll station. to ensure obtaining original and reliable toll data from communication network, 2m circuitous chain is established between each toll station, accountsettlement center and road section management company, and also pstn dialing backup chain is set up between toll station and account settlement center. in order to maintain clock synchronization of the whole communication network, a proposal of sub - stage clock sychrononization signal network for differet network construction scale has been put forward in this design. in view of sensitivity and importance of toll data, this design particularly gives considerations of network safety and information safety for external and internel of network. therefore, communication safety, smoothness and reliability of networking toll system can be able to maintained in many ways
重慶高速公路聯網收費數據通信網的結構是根據高速公路的物理結構構築了2環8射的網狀結構，建立了以sdhstm - 4 （可升級到stm - 16 ）的傳輸主幹層，以sdhonu / oltstm - 1 （可升級到stm - 4 ）組成的通道保護業務接入層。數據的交換層是在sdh網之上的ip路由交換網，形成了結算中心-路段管理公司-收費站之間的3級計算機網路結構。為從通信網路上保證收費數據的原始性和可靠性，每個收費站和結算中心、路段管理公司之間建立了2m迂迴鏈路，同時在收費站和結算中心之間建立了pstn的撥號備份鏈路。 -
Th azl hungry drunk plunged a trunk of lungs into the tunnel under the channel
饑餓的醉漢把一大箱肺投進了水渠下面的隧道 -
The keys to sand mining management in the trunk channel of the middle and lower yangtze river are whether or not the related decision of the country is scientific and reasonable, whether or not the policies of all level governments are correct
長江中下游幹流河道采砂管理的好壞，關鍵就在於國家的有關決策是否科學、合理，各級人民政府的政策擇取是否正確。 -
The development course of sand mining management in the trunk channel of the middle and lower yangtze river is also the course of continual renewal and readjustment of national and all level government ' s policy decision on sand mining in river channel
長江中下游幹流河道采砂管理的發展歷程，也就是國家及各級政府有關河道采砂問題決策不斷更新、調整的一個過程。 -
The plan and research process, the main achievements and effectiveness on sand mining in the trunk channel of middle and lower yangtze river are systematically presented and the further work suggestions on doing a good job of sand mining plan in trunk channel of the middle and lower yangtze river are put forward
較系統地闡述了長江中下游幹流河道采砂規劃研究過程、取得的主要成果以及成效，提出了進一步做好長江中下游幹流河道采砂規劃工作的建議。 -
The existing telephone systems occupy a fixed channel during calls while tdm technology allows several calls to be carried simultaneously on a trunk line
已有的電話系統在雙方通話時要佔有一個固定的通道。在通話過程中這條線路始終是被佔用的。
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