Pipe for perfected drainage. (Machine-translation by Google Translate, not legally binding)

摘要

Pipe for improved drainage, characterized in that it consists essentially of a skeleton, or mesh of plastic material that provides resistance to withstand the external ovalizing loads, to the tube itself that is constituted by a porous granular mass, in plastic material, envelope of the skeleton or mesh and intimately locked with it to form a monolithic body, whose walls are totally permeable. (Machine-translation by Google Translate, not legally binding)