Manhole covers produced by this manufacturer can be found in many countries, primarily across Europe (see the list of countries later on this page).
Most covers are made of metal , with a smaller number made of concrete . Their shapes are rectangular , circular , or square . One cover found on the site has a diamond-like shape .
Circular covers designed for sidewalks are often framed within a square outline to facilitate paving work .

No colored or gilded covers by this manufacturer have been found.
City emblems appear on some covers (mainly upon the request of local authorities) .

On many covers, the function is not indicated. In other cases: communication covers usually bear the name of the communication provider , drainage covers are identified by their drainage slots , and sewer covers typically include the word “Sewer” or “Sanitation” in the local language of the country (for example, SANEAMIENTO in Spain ), and so on.

The year of manufacture generally does not appear.

Standards
The European Standard EN124 and its associated load classes are found on many covers, with the most common load classes being B125 and D400 .
The French NF standard is also common , as is the British Kitemark .
Since the manufacturer’s covers are made for many countries, other national standards can also be found — for example, the Spanish AENOR , the Polish IO-CERT , the Belgian COPRO , and even the Israeli Standard Mark .

Typical Covers
Many covers belong to the company’s product series that share similar designs: the BRIO model , the GEO model , and others.
Numerous covers are characterized by a studded pattern — square or round , a pattern of very small squares , or a diamond-patterned background .

Drainage covers appear in a variety of slot shapes and separating bar designs , , .

Many covers are diagonal — square or rectangular covers composed of two triangles, where opening is done by lifting one of the triangles . There are 192 manhole covers in the site that are made by the Manufacturer
Click for the 192 covers made by Norinco (Of these, 0 are best covers)