Lugs and relief areas formed on one face are staggered with {HEAD ~ respect} to the lugs and relief areas formed on {TAIL ~ the other face} 
Lugs and relief areas formed on one face are staggered with { HEAD ~ respect } to the lugs and relief areas formed on { TAIL ~ the other face }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL