The palladium based {HEAD ~ three way catalyst} is carried on {TAIL ~ a substrate}, which may be the trapping material, in an amount of between about 100 500 g palladium/ft3 of substrate 
The palladium based { HEAD ~ three way catalyst } is carried on { TAIL ~ a substrate } , which may be the trapping material , in an amount of between about 100 500 g palladium / ft3 of substrate
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH