A feeding device 4 wherein {HEAD ~ said filling element} is formed as {TAIL ~ a filling flap} 
is formed as
A feeding device 4 wherein { HEAD ~ said filling element } is formed as { TAIL ~ a filling flap }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL