{HEAD ~ a rigid unyielding inclined surface} projecting into {TAIL ~ said storage space} and extending downwardly and laterally inwardly with respect to said storage space, 
{ HEAD ~ a rigid unyielding inclined surface } projecting into { TAIL ~ said storage space } and extending downwardly and laterally inwardly with respect to said storage space ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH