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