 efere nhazi ụlọ ọrụ: mkpuchi, aluminum, plastic na chemical, na PCB, akpali ụgbọala ahụ, ihulata isi, track, kpakpando mgbochi pụrụ iche osisi, epoxy, resin, ABS, eyi, Pee, na ndị ọzọ na carbon ngwakọta; 