Site na ngwa sara mbara nke igwe na-ekpo ọkụ na ụlọ ọrụ dị iche iche, igwe kpo oku electromagnetic na-edochi njikwa ọkụ ọkụ mmanụ ọkụ, ka ọ dị ugbu a, a na-eji igwe kpo oku elektrọn mee ihe nke ọma na mbipụta laser mgbochi, ọnwụ stamping, ihe mejupụtara enyo enyo enyo enyo, mmepụta ihe nkiri mejupụtara, ahụike. teepu, ọgwụ nkwakọ, na-abụghị kpara ákwà mmepụta, aluminum-plastic panel agglutination, sịntetik eriri, roba na plastic kalenda na ndị ọzọ ọrụ.