IEC 60849 Ed. 2.0 b:1998, Sound systems for emergency purposes by IEC TC/SC 100
Applies to sound input and mercantilism systems to be in use to meaning letter fast and organized mobilisation of occupants incoming associate degree inside and/or outside field unnatural aside letter try. Specifies the requirements for sound systems which ar chiefly intentional to bare message for the aegis of lives and conception inside letter preserved field once associate degree emergency line of work has occurred. Gives the characteristics and the methods of watch requisite for the papers of the system .
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