Various
CE is a certification mark for products belonging to the European Economic Area (EEA). The quality mark indicates that the product meets health standards, is safe and does not harm the quality of the environment.

CE was founded in 1985, when the symbol stands for Conformité Européenne (European Conformity)

The page dedicated to CE on the European Commission website https://ec.europa.eu/growth/single-market/ce-marking/

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 3 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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