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Normas BSI – AENOR
BS 6353:1983

BS 6353:1983

Specification for underground loudspeaker communication systems in coal mines

Fecha:
1983-04-29 /Under Review
Comité:
MRE/3
Keywords:
Communication networks, Circuits, Voltage, Loudspeakers, Coal mining, Electrical safety, Output impedance, Safety devices, Mines, Telephone systems, Network parameters, Signal level, Mining equipment, Input impedance, Overvoltage protection, Audio systems, Overcurrent protection, Underground, Audio equipment, Electrical protection equipment, Speech transmission systems, Communication cables, Electric cables, Communication equipment, Acoustic couplers
129,02
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Formato digital

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