介绍了新《聚乙烯燃气管道工程技术规程》主要修改内容及使用中应注意的问题。
Introducesd the main revision content and the issues should be noted in the use of the new "polyethylene gas pipeline engineering Technical schedule".
结合某市工程实例，探讨了地理信息系统在埋地燃气管道风险分析中的应用。
The application of geographic information system(GIS)in the risk analysis of buried gas pipeline is studied with the engineering example in a certain city.
特许经营的业务为在规划区内燃气管道工程建设，达到燃气城市供暖。供气及燃气的储备。充装燃气汽车加气的开发与应用。
Franchising business is gas pipeline construction in the planning area to reach gas, urban heating gas reserves and to promote the development and application in gas vehicle refilling.
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