A perfected planner board (Machine-translation by Google Translate, not legally binding)

摘要

An improved planter board, characterized in that it consists of a base plate, on which are fixed equidistantly a series of longitudinal sections of U-section and paramagnetic material, the vertices of the bottom protruding from said U being chamfered, so that against the chamfer of a profile and the chamfer of the immediate profile can be attached to the respective faces of a magnetized bar of suitable length and preferably triangular polygonal section, said bar being fixed to those profiles by virtue of its magnetic condition. (Machine-translation by Google Translate, not legally binding)