This drum wall 5 has on the outside a plurality of {TAIL ~ plastic elevations} such as {HEAD ~ mandrels} 6 
This drum wall 5 has on the outside a plurality of { TAIL ~ plastic elevations } such as { HEAD ~ mandrels } 6
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD OTH