However, according to the present invention, by virtue of the grooves formed at the side flash by laser irradiation, it is possible to easily remove the side flash and to improve {HEAD ~ deflashing efficiency} and quality of {TAIL ~ products} 
of
However , according to the present invention , by virtue of the grooves formed at the side flash by laser irradiation , it is possible to easily remove the side flash and to improve { HEAD ~ deflashing efficiency } and quality of { TAIL ~ products }
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