Nke a square (ewepụghị) ala zipa akpa na-eme igwe, mmekọrịta na erughị ala akara usoro, nke nwere PLC auto n'iji ya gee ntị, na-agba ọsọ ma na-achịkwa n'okpuru dị iche iche mgbagha na kpatara nchoputa usoro, nke bụ ihe kasị mma ngwá maka zipa square ala akpa mmepụta, site substrates dị ka ndị dị otú ahụ. plastic / plastic, akwụkwọ / plastic, akwụkwọ / akwụkwọ laminated ihe