The second series of laser drilled wells form a tab which provides {HEAD ~ a more rigid tack} to {TAIL ~ the substrate material} thereby giving greater adhesion of the substrate to the panel of substrate material, wherein the irregular shaped substrate is retained in the panel of substrate material without breaking 
The second series of laser drilled wells form a tab which provides { HEAD ~ a more rigid tack } to { TAIL ~ the substrate material } thereby giving greater adhesion of the substrate to the panel of substrate material , wherein the irregular shaped substrate is retained in the panel of substrate material without breaking
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