... indoors,in tunnels or cable trench,unable to bear external mechanical forces.Singlecore cable in magnetic duct is not ... trench,or direct in ground,able to bear external mechanical forces.but unable to bear large pulling force.YJLV22Alumium conductor,XLPE ... cable trench,well or direct in ground,able to bear external mechanical forces and Determinate pulling force.YJLV32Alumium conductor,XLPE insulated ...