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Helical-scan video tape cassette system using 12,65 mm (0,5 in)magnetic tape on type Beta format - FM audio recording - Part 1-625 line-50 field systems. IEC 1053-1:1991. Original standard IEC 61053-1-1991 in PDF full version. Additional info + preview on request

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Helical-scan video tape cassette system using 12,65 mm (0,5 in)magnetic tape on type Beta format - FM audio recording - Part 2-525 line-60 field systems. IEC 1053-2:1991. Original standard IEC 61053-2-1991 in PDF full version. Additional info + preview on request

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General purpose lead-acid batteries (valve-regulated types) - Part 1- General requirements, functional characteristics - Methods of test. IEC 61056-1:2012. Original standard IEC 61056-1-2012 in PDF full version. Additional info + preview on request

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General purpose lead-acid batteries (valve-regulated types) - Part 2- Dimensions, terminals and marking. IEC 61056-2:2012. Original standard IEC 61056-2-2012 in PDF full version. Additional info + preview on request

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Corrigendum 1 - General purpose lead-acid batteries (valve-regulated types) - Part 2- Dimensions, terminals and marking. Original standard IEC 61056-2-2012 cor1-2012 in PDF full version. Additional info + preview on request

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Live working - Insulating aerial devices for mounting on a chassis. IEC 61057:2017-05. Original standard IEC 61057-2017 in PDF full version. Additional info + preview on request

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