Specifically, {HEAD ~ the main body portion} comprises {TAIL ~ two side members} that extend between the two end portions in spaced parallel relation and a plurality of bridge portions that extend between and secure the two side members in their parallel relation 
Specifically , { HEAD ~ the main body portion } comprises { TAIL ~ two side members } that extend between the two end portions in spaced parallel relation and a plurality of bridge portions that extend between and secure the two side members in their parallel relation
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH