Debe existir un medio de comunicación entre el punto de operación del malacate y los puntos de cargue y descargue en el interior de las labores subterráneas, que permita el intercambio de señales (timbre, campana, teléfono, tubería, alumbrado, etc.).
Decreto 1335 de 1987 →In force
Article 64
Decreto 1335 de 1987 · mediante el cual se expide el reglamento de seguridad de las labores subterráneas.
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