32 صفحه
IEC 60079:2013-Explosive atmospheres &ndash Part 31: Equipment dust ignition protection by enclosure t
لینک منبع و پست :http://campiran.ir/project-99856-iec-600792013-explosive-atmospheres-%e2%80%93-part-31-equipment-dust-ignition-protection-by-enclosure-t/
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