IEC: 388 - 1 - 1972; Thermal time delay switches for use in equipment for telecommunication and in electronic applications employing similar techniques Part1 general resquirements and measuring methods

IEC: 388 - 1 - 1972; Thermal time delay switches for use in equipment for telecommunication and in electronic applications employing similar techniques Part1 general resquirements and measuring methods - Geneva IEC 1972 - 45p

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