Ọbụna ojiji nke mgbasa ozi uzuzu siri ike, ma na-enwekwa mmetụta na-ekpochapụ uzuzu dị mma
Yiri mgbochi, ogologo ndụ
Ọ nwere ọrụ nke ichekwa ma na-ebufe mmanụ fọdụrụnụ
Iji ihe na-agbanwe agbanwe nwere ike ibelata esemokwu
Standard components conforming ọkọlọtọ grooves