{HEAD ~ A storage space} is defined by a wall which in its lower portion is provided with {TAIL ~ an inclined surface}, which protrudes into the storage space 
{ HEAD ~ A storage space } is defined by a wall which in its lower portion is provided with { TAIL ~ an inclined surface } , which protrudes into the storage space
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH