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