norma covenin 2245- 90 - escalreas, rampas y pasarelas. requisitos de seguridad
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La Norma Venezolana COVENIN 2245- 90 - Escalreas, Rampas y Pasarelas. Requisitos de SeguridadTRANSCRIPT
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DESCRIPTION
La Norma Venezolana COVENIN 2245- 90 - Escalreas, Rampas y Pasarelas. Requisitos de SeguridadTRANSCRIPT