English to Italian Tech/Engineering Other disegni industriali/tolleranze

Profile tolerance for a surface.

A form template shall be placed on the surface (the form template constitutes tangent surface).
The difference in dimensions between encircling form template and surface shall be measured. This can be done with **air column measurement** or, in special cases, by means of marking paint.
The difference in dimensions is always greater than or equal to the value which would have been obtained if measuring had been in accordance with the definition of the tolerance.