Apparatus and system warning or witness of the release of level or depletion of a liquid in a deposit of any size or form with a right or inclined fund. (Machine-translation by Google Translate, not legally binding)

摘要

Apparatus and warning system or witness of the level drop or depletion of a liquid in a tank of any size or shape with a straight or inclined bottom. (Machine-translation by Google Translate, not legally binding)