| 摘要 |
Device for spatial visualisation of the set of mechanical magnitudes of the international system as well as of their units and of their symbols. The invention relates to a structure physically representing, by balls x.y.z placed at the intersection of stalks T.x.y, L.y.z and M.x.y, the position of the mechanical magnitudes with respect to an origin 0.0.0 defined in a right-angled reference system by the stalks T. (time axis), L (length axis), and M (axis of masses). Any mechanical magnitude can be expressed as a function of these three basic data items (LMT system), and this product makes it possible to group together all the mechanical magnitudes of the international system. This structure is of interest in teaching, since it makes it possible to reveal the formulae linking the mechanical magnitudes, or to carry out verification of calculations by equating units. <IMAGE>
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