structure of level bubble, particularly for construction to impieg or improved

摘要

this found it has as its object a structure of leveling bubble, particularly for construction.that includes a support structure that defines a reference level and supports at least one tube in a transparent, partially with a liquid, in order to achieve.within the tube, a bubble which is mobile along the tube to vary the provision of reference.in the bubble, according to this found, under illumination are prepared in the vicinity of the tube mentioned and that are accessible or disattivabili in command.