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Surface mounted piezoelectric devices for frequency control and selection - Standard outlines and terminal lead connections - Part 1- Plastic moulded enclosure outlines. IEC 61837-1:2012. Original standard IEC 61837-1-2012 in PDF full version. Additional info + preview on request

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Surface mounted piezoelectric devices for frequency control and selection - Standard outlines and terminal lead connections - Part 2- Ceramic enclosures. IEC 61837-2:2018-05+AMD1:2020-09 CSV(en). Original standard IEC 61837-2-2020 in PDF full version. Additional info + preview on request

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Surface mounted piezoelectric devices for frequency control and selection - Standard outlines and terminal lead connections - Part 3- Metal enclosures. IEC 61837-3:2015-04(en-fr). Original standard IEC 61837-3-2015 in PDF full version. Additional info + preview on request

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Surface mounted piezoelectric devices for frequency control and selection - Standard outlines and terminal lead connections - Part 4- Hybrid enclosure outlines. IEC 61837-4:2015-03(en-fr). Original standard IEC 61837-4-2015 in PDF full version. Additional info + preview on request

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Nuclear power plants - Design of control rooms - Functional analysis and assignment. CEI/IEC 61839:2000. Original standard IEC 61839-2000 in PDF full version. Additional info + preview on request

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Microphones and earphones for speech communications. IEC 61842:2002. Original standard IEC 61842-2002 in PDF full version. Additional info + preview on request

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