Full Title

Removing undesirable matter from roads or like surfaces, with or without moistening of the surface (for snow or ice E01H5/00; cleaning tramway rails E01H8/00; obstruction removers on vehicles B60R19/00; in combination with application of bitumen or the like E01C19/16; in combination with application of traffic line E01C23/16 ) > Pneumatically dislodging or taking-up undesirable matter ( suction cleaners in general A47L5/00 - A47L9/00; ); Drying by heat only or by streams of gas (permanently-installed heating or blowing devices E01C11/26; heating or drying for road- building or repairing E01C23/14; ); Cleaning by projecting abrasive particles (sand-blasting in general B24C; )