The inner wall member includes a transverse bottomplate which is provided with a series of {HEAD ~ openings} around {TAIL ~ its periphery} 
around
The inner wall member includes a transverse bottomplate which is provided with a series of { HEAD ~ openings } around { TAIL ~ its periphery }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL