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