The author points out that three basic factorsal are essential to the formation of teb : the traffic trunk line , group of towns , and the industrial sys tem based on the seconda ry industry and the tertiary industry 通过典型经济带的实证分析发现了“工业自生长点沿着交通轴集聚、扩散及再集聚的动态过程” ，将其命名为工业波。
Almost 150 , 000 passengers were stranded at guangzhou railway station on saturday night after a power failure caused by snow , ice and sleet stopped more than 136 trains in hunan province on the trunk line between beijing and guangzhou 在一场冰雪造成的电力中断导致136辆列车停在湖南省后，周六晚大约有15万旅客滞留在广州火车站。
Most part of the north trunk line of wanjiazhai yellow river delivery project has to pass through the zone of collapsible loess , so the collapsibility of the loess foundation becomes the main engineering geological problem therein 摘要山西省万家寨引黄工程北干线输水管线大部分地段通过黄土地区，黄土地基的湿陷性已成为主要的工程地质问题。
Thousands of users must share the limited bandwidth on the same trunk line , which to the contrary also produces serious accumulated noises . in the worst case , even the analog phone service could not be offered 原因很简单，成千上万个用户必须分享同一干线上的有限带宽，同时在干线上还将产生严重的噪声积累；严重情况下，甚至连模拟电话业务也难以提供。
Almost 150 , 000 passengers were stuck at guangzhou railway station by jan . 26 night after a power failure caused by snow , ice and sleet stopped more than 136 electric trains in hunan province on the trunk line between beijing and guangzhou 报道中说，截止至1月26日晚，由于大雪造成的停电，致使广州火车站内大约15万名旅客滞留；而冰雪天气同时导致京广线湖南境内超过136列列车受阻滞留。
Since a 155 mbits trunk contains 1 , 890 trunk lines at most , it makes a greater impact than a 2 mbits one in case of a fault . thus the guarantee of network safety is a primary consideration in using the 155 mbits trunk 由于一个155mbits中继最多可包含有1890条中继，一旦出现故障，其影响面要比一个2mbits中继出现故障大的多，因此如何保证网络运行的安全性是采用155mbits中继首先要考虑的问题。
This instrument can meter the electric level , frequency spectrum , carry to noise ratio , a / v , cobbly ratio , voltages of the ac trunk line and the battery . furthermore it can display the above information on the lcd and store them in the eprom 该场强仪可以对有线电视系统的电平、频谱、载噪比、 a v比、系统不平度、交流干线和电池电压等进行测量，并通过液晶显示，结果保存于eprom中。
In 2000 year ' s " shipping safety management year " activities plan , the ministry of communications was clear and definite to advance the requirement of enhancing safety management in the " four areas and one line " . one line means the yangtze river trunk line 2000年，在全国“水上运输安全管理年”活动方案中，交通部明确提出了加强“四区一线”的安全管理的要求，其中的“一线”就是长江干线。
Distribution of cities , towns and other inhabited areas as well as factories , mines and trunk lines of railways and highways should avert the threat of mountain torrents ; for those having been built in places threatened by mountain torrents , precautions should be taken 城市、村镇和其他居民点以及工厂、矿山、铁路和公路干线的布局，应当避开山洪威胁；已经建在受山洪威胁的地方的，应当采取防御措施。
Nanle hongye chemical co . , ltd . is located at the converging point of three province ji , lu and yu , 106 country road and anyang - jinan road meet here , two trunk lines beijing , guangzhou and beijing jiulong railway just nearby . all of these bring quite convenient transport environment 南乐县宏业化工有限公司位于冀，鲁，豫三省交界处， 106国道，安济公路在此交汇，于京广，京九两大铁路干线相邻，交通十分便利。
