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。
The properties, production technology and classification of single-piece of fire-proof glass are described in this paper.
介绍了防火玻璃的性能，以及国内防火玻璃的生产技术和分类。
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