摘要
对UL 674标准第四版与第三版的主要技术差异进行了分析对比,并对新标准中增加的内容进行了简单的介绍。
In this article, the main difference between forth version and third version of UL674 is compared and analyzed, furthermore, the new eontent added in the forth version of this standard is introduced.
出处
《电气防爆》
2007年第3期16-21,共6页
Electric Explosion Protection
