In 1995, with the Baozhong railway being open to thetraffic, a circular railway, which is consist of the railways of Longhai, Baozhong, Baolan and joins three railway pivotal cities── Lanzhou, Baoji, Zhongwei in the middle of Northwest China, appears spontaneously.
本文在揭示陇海─宝中─包兰环状铁路沿线旅游资源优势、剖析其旅游业发展现状的基础上，提出了该区域旅游业可持续发展的６条思路。
However,how to implement effective learning for data on manifold with rings is still a remaining problem.
然而,当面对球体、柱体等环状流形产生的非线性流形数据时,这些方法往往会失效。
THE TOURIST EXPLOITATION AND SUSTAINABLE DEVELOPMENT OF TOURIST UNDUSTRY IN THE REGION ALONG LONGHAI - BAOZHONG - BAOLAN CIRCULAR RAILWAY;
陇海─宝中─包兰环状铁路沿线区域旅游开发与旅游业的可持续发展
IV. Building an Ecology-Friendly Railway Line - the Qinghai-Tibet Railway
四、 建设生态环境保护型铁路——青藏铁路
Comprehensive Evaluation on Eco-environmental Status of the Belt Area along the Proposed Railway from Xinjie to Enge'alou and Its Environmental Protection Measures
拟建新街—恩格阿娄铁路沿线生态环境现状的综合评价及对策
belt line+[ 1 ]
[美]环城铁路, 消防绳
ferrite-core loop antenna
铁氧体磁性环状天线
a ramified system,eg of railways
网状系统（如铁路的）.
Under the High-speed Railroad Condition Railroad Health Environmental Protection Works the New Mentality
高速铁路条件下的铁路卫生环保工作新思路
Explaining Railway Industry Standard "Railway Environment Vibration Measurement"
解析铁道行业标准《铁路环境振动测量》
Study of Frozen Soil Environment Relating to Qinghai-Tibet Railway Embankment;
青藏铁路路基对冻土环境的影响研究
Present Conditions,Causes and Countermeasures of Public Security on Rail Lines;
浅谈铁路线路治安现状、原因和对策
Working Paper on Environmental Concerns [Mass Transit Railway]
环境关注工作文件〔地下铁路〕
Code for environmental protection design of railway engineering
铁路工程环境保护设计规范
Analysis shows that the weak link at the moment is the railways.
分析的结果，当前的薄弱环节是铁路。
The most stringent environmental protection measures in China's railway construction history have been introduced.
采取铁路建设史上最严格的环保措施。
Study on Environment Protection of Railway Constraction in Southwest;
我国西南地区铁路建设环境保护研究
Study on Protection Engineering of Ecological Environment in Railway Construction;
铁路建设中生态环境保护的技术研究
The Study on Indicial System of Railway Plan Environment Impact Assessment;
铁路规划环境影响评价指标体系研究
Research on Treatment Technology for the Circulation Use of Railway Scouring Sewage;
铁路洗涤污水循环利用处理技术研究