Another object of the invention is to provide {HEAD ~ a spray polyurea elastomer system} which has {TAIL ~ excellent flexibility} and elongation when applied to railcars to withstand the constant flexing railcars are subject to 
has
Another object of the invention is to provide { HEAD ~ a spray polyurea elastomer system } which has { TAIL ~ excellent flexibility } and elongation when applied to railcars to withstand the constant flexing railcars are subject to
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