3 PARTICLES FOR USE IN APPARATUS FOR MECHANICALLY CLEANING, PEENING AND/OR FINISHING THE SURFACES OF METALS
7 APPARATUS FOR MECHANICALLY CLEANING, PENNING AND/OR FINISHING THE SURFACES OF METALS AND OTHER MATERIALS AND PARTS AND ACCESSORIES THEREFOR, AND WATER AND WASTEWATER TREATMENT EQUIPMENT-NAMELY, AERATORS AND SLUDGE SCRAPER UNITS
11 AIR POLLUTION CONTROL SYSTEMS CONSISTING OF PARTICULATE SOLIDS COLLECTORS
THE MARK IS A TRIANGULAR DESIGN COMPRISED OF A SERIES OF PARALLEL BARS.