{HEAD ~ Structures} 12 and 13 of each wall section 35 are typically molded as {TAIL ~ one unit}, i.e., are interconnected 
are typically molded as
{ HEAD ~ Structures } 12 and 13 of each wall section 35 are typically molded as { TAIL ~ one unit } , i.e. , are interconnected
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH