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Group I, equipment protection level Ma intended to remain functional in atmosphere endangered by firedamp and/or coal dust
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Automatic burner gas forced air. Technical safety requirements and test methods
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Electric resistance welded joints. Main types, design elements and dimensions
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Electric cables. Calculation of the current rating. Part 1-2. Current rating equations (100 % load factor) and calculation of losses. Sheath eddy current loss factors for two circuits in flat formation
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