NF C68-108:1988 Conduits and fittings for electrical installations. Circular cross-section, metal, plain, rigid, very heavy, threadable and non-threadable, non-flame propagating conduits - Type mrb.
1988NF C68-108:1988 Conduits and fittings for electrical installations. Circular cross-section, metal, plain, rigid, very heavy, threadable and non-threadable, non-flame propagating conduits - Type mrb.