1. Ha nwere ọrụ nke mmiri ikuku nke nwere ike itinye n'ime ogwe aka (nhọrọ)
2. Na njikwa ụkwụ, Ọ dị mfe maka ịrụ ọrụ ma zuru ike aka.
3. Igwe mpịachi nkenke anyị PBB serials na-egosipụta usoro pedal. Anyị etinyela akwụkwọ maka nchekwa patent n'ụlọ.
4. A na-eji igwe mpịachi nkenke anyị na-ehulata akụkụ mpempe akwụkwọ. Enwere ike ihichapụ agụba elu maka ojiji. Ọ nwere ike họrọ nchikota nke elu agụba dị ka abnormity ogo na ogologo nke workpiece.
