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