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MIRA TOPOGRÁFICA PERFECCIONADA que se caracteriza esencialmente por estar constituida por una lámina longitudinal de aluminio anodizado preferentemente, unida a un listón de madera ligera o material similar, quedando asegurada tal unión por dos perfiles longitudinales dispuestos a todo lo largo del listón que adoptan sensiblemente la forma de una "J" en su perfil, de modo que originen un rebordeado que al propio tiempo que muerden sobre los extremos de la lámina gráfica de la mira, y aseguran tal unión, protegen a dicha lámina de posibles desperfectos en los caracteres gráficos de la misma.