Explosion-proof electrical equipment. Terms and definitions. Classification. Markings
Электрооборудование взрывозащищенное. Термины и определения. Классификация. Маркировка. |
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KZ 2117Approval of the Technical Regulation "Safety … |
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GOST 21.603-80Communications, signals, and alarms |
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GOST 380-88Commercial quality carbon steel. Grades |