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Surface mounted piezoelectric devices for frequency control and selection. Standard outlines and terminal lead connections - Metal enclosures. Original standard BS EN 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 - Hybrid enclosure outlines. Original standard BS EN 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. Original standard BS EN 61839-2014 in PDF full version. Additional info + preview on request

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

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Communication networks and systems for power utility automation - Conformance testing. Original standard BS EN 61850-10-2013 in PDF full version. Additional info + preview on request

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Communication networks and systems for power utility automation - General requirements. Original standard BS EN 61850-3-2014 in PDF full version. Additional info + preview on request

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