Nkọwapụta ngwaahịa nke ụlọ ọrụ anyị sitere na 2-3 / 8 ruo “20 ″, yana ọkwa nchara sitere na J55 ruo Q125, na-ekpuchi usoro niile na akara nchara.
Akụrụngwa akụrụngwa nke ụlọ ọrụ anyị na-azụta site na nnukwu igwe igwe ụlọ nke ama ama ama.
Anyị ga-enyocha nyocha siri ike na ngwaahịa ọ bụla na usoro nke mmepụta, yana mpempe ihe nkedo ọ bụla ma ọ bụ nyocha ọkpọkọ na-ejigide ndekọ ndekọ ya, usoro nyocha, njirimara nyocha nyocha, nyocha phosphating na nkwakọ ngwaahịa, iji ghọta nnweta ahụ usoro niile, iji hụ na ngwaahịa niile nwere ike mezuo ihe ndị ahịa chọrọ.