本文通过对事故实例的分析，指出接地的必要性和几种接地方式在防火、防爆方面的局限性。
Analysing the accident examples in this paper shows that earth connection is necessary and some earthed methods exist limitations for fire-proof and explosion-proof.
本文对采用直埋敷设方式的武当山路蒸气支管事故调查和原因进行了分析，提出了应用该技术需注意的问题。
This paper analyses accident cause for steam pipe on Wudang Road and points out some attentive questions to extend as far as pipe engineering.
分析过程采用现场勘察，材质分析，强度校核，断口分析等方式，在遵循客观事实的前提下对事故进行了总结与思考。
The whole analysis process and method included survey on site, strength check, material analysis, Fracture analysis. Finally, summary for the accident reason and some opinion were put forward.
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