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The Center for Construction Materials, consisting of the State Materials Testing Institute Darmstadt (MPA) and the Department and Institute for Materials Science (IfW) is the center for research and test of metal in the Technical University Darmstadt

The Institute web site https://www.mpa-ifw.tu-darmstadt.de/startseite_mpaifw/index.de.jsp

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.
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