

They are steel structures manufactured in steel as rigid support, whose function is to provide immediate safety, coupling as closely as possible to the excavation line at the tunnel's advancing face. Contact us: PROMINE PERU Phone: (511) - 7584483 Mobile: 968712557 - 992022313 - 987212054 E-mail: ventas@promineperu.com LIMA-PERU www.promineperu.com
