The waste containers, because they have been selected to interfit without voids or spaces therebetween as they are faced contiguously to each other in horizontal and vertical extension, collectively form, in essence, {TAIL ~ a solid structure} which can be extended to {HEAD ~ great heights}, and is characterized by very substantial structural strength 
The waste containers , because they have been selected to interfit without voids or spaces therebetween as they are faced contiguously to each other in horizontal and vertical extension , collectively form , in essence , { TAIL ~ a solid structure } which can be extended to { HEAD ~ great heights } , and is characterized by very substantial structural strength
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