求翻译：随着现代科学技术的发展，管道运输作为一种高效、安全、可靠的手段应用日益广泛，城市中的地下排水系统、取暖系统、煤气系统、自来水系统等都应用了各种管道；另外，在现代工农业、石油、化学、核工业等领域也大量使用了管道。经过长期使用，它们会出现裂纹、腐蚀、堵塞等故障。有的管道中输送的是剧毒或放射性介质，若这些管道产生裂纹、漏孔会造成介质泄漏，引起事故甚至发生灾难。为了防患于未然，必须对这些管道进行定期检测和维修。但是它们有的埋在地下，甚至埋在海底，有的口径很小，人无法进入。挖出管道进行检测、维修既不经济又不现实，由此可见，管道机器人有着广阔的市场。是什么意思？

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Along with the modern science and technology development, the pipeline transportation took one kind highly effective, safe, the reliable method application is day by day widespread, in the city under-drainage system, warmed up the system, the coal gas system, the aqueous system and so on all has app

With the development of modern science and technology, pipeline transportation as a means to an efficient, secure and reliable applications growing, urban underground in drainage systems, heating systems, gas piping systems, water systems are application; in addition, in modern industry and agricult