Catalysts employing {HEAD ~ the particles} as a support and having catalytic agents distributed at controlled depths in {TAIL ~ the particle} have excellent initial and sustained activity and durability, especially for eliminating pollutants in automotive exhaust streams 
Catalysts employing { HEAD ~ the particles } as a support and having catalytic agents distributed at controlled depths in { TAIL ~ the particle } have excellent initial and sustained activity and durability , especially for eliminating pollutants in automotive exhaust streams
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH