CORPI A PORI APERTI, STABILI NELLA DIMENSIONE.

摘要

This body (4) is degradable and has a multiplicity of concave pores (7) connected to neighbouring pores by short passages (6) or to the exterior of the body, the latter being made of a biodegradable plastic (5) permitting an autoseparation of the filtered particles. Application especially to the air filters of motor vehicles.