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The joints of rails and switches welded. Nondestructive inspection methods
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Rails welded by electric contact method. Specifications
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Welded components of joints and intersections of railway tracks. Specifications
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Electrical accessories. Circuit-breakers for overcurrent protection for household and similar installations. Part 1. Circuit-breakers for a.c. operation
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Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses. Part 1. General rules and test methods
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