{HEAD ~ A plug} is used in the thermoforming process to contact the sheet and position the sheet within {TAIL ~ a die} 
{ HEAD ~ A plug } is used in the thermoforming process to contact the sheet and position the sheet within { TAIL ~ a die }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL