The S11, S13, S20, S22-M usoro n'ụzọ zuru ezu anọkwasị mmanụ-mikpu ike transformer mepụtara na-emepụta anyị ụlọ ọrụ nwere uru nke ala ọnwụ, ala mkpọtụ na elu arụmọrụ, nke nwere ike nweta ezi ume na-azọpụta mmetụta ma belata mmetọ. Ihe mkpuchi mkpuchi zuru oke na ihe ntụgharị mmanụ nkịtị, ma e jiri ya tụnyere mkpochapụ nke kabinet nchekwa mmanụ, mgbanwe olu mmanụ site na mpempe mmanụ corrugated mmanụ nke elasticity nke mgbanwe akpaaka iji kwụọ ụgwọ maka ihe ngbanwe dịpụrụ adịpụ site na ikuku iji gbochie ma belata mmebi nke mmanụ na ịka nká nke mkpuchi, welie ntụkwasị obi nke ọrụ ahụ n'efu.