Protection plate for protection of underground pipelines in e.g. cultivated ground, has perforations in particular pattern for drainage of water, where plate is made from extruded polyethylene with specific thickness

摘要

The plate has perforations in a particular pattern for drainage of water. The perforations are identical in size from one end to the other end of the plate. Each perforation has a diameter of 20 mm, where the plate is made from extruded polyethylene with a thickness of 15 mm, and the plate is identical to a standard protection plate.