Vocabulary (IEV) - Part 426: Explosive atmospheres国际电工词汇 爆炸性环境机械科学研究总院集团有限公司李桂芳21IEC60050-447:2020 Ed 2.0International Electrotechnical Vocabulary (IEV) - Part 447: Measuring relays and protection equipment...
It is perfect choice if you operate in harsh, potentially explosive environments certified as Zone 1/21, division1....
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