| http://www.w3.org/ns/prov#value | - An advantage of these over simple single-transformer systems is less electrical noise inducted in adjacent wiring, particularly in communications wires used for signals and other systems that typically operate at (and are insulated for) low voltages, where induced currents could damage systems or provide a safety hazard.Note: The text of the article clearly discusses BT systems in terms of non-Shi
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