The ultimate manhole covers site
A German institute founded in 1866 to monitor the health of the steam boilers that began to be used in cars. These days the institute provides inspection and control services worldwide, with more than 670,000 licenses and more than 1,000 locations worldwide.

TÜV - Technischer Überwachungsverein - Association for Technical Inspection.
SÜD - South

The home page of the organization

An example of a cover that carries the standard on the "ultimate manhole covers" site. From this lid the picture that appears in the general section was taken.
There are 6 manhole covers in the site that has this standard mark
Click for all the covers with this standard

Click for the rest of the standards in the site

The ultimate manhole covers site

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