Otu esi eme nzacha nzacha ihu
一, Ngwa maka nzacha nzacha ihu:
1. Ihe dị mkpa ka a kwadebere bụ nchara nchara, efere ígwè, efere aluminum, efere ọla kọpa, wdg.
2. Mechanical akụrụngwa eji kechie nzacha nzacha: tumadi igwe ọkpọ ọkpọ.
二, Mmepụta nzọụkwụ nke ntupu nzacha n'ọnụ:
1. Jiri ntụmadị nwere obere tonnaji tụọ nchara igwe anaghị agba nchara n'ime obere okirikiri ma ọ bụ akụkụ anọ. na ndị ọzọ ekara iberibe.
2. Punch efere ígwè (ejiri igwe anaghị agba nchara, galvanized efere, aluminum plate, ọla kọpa efere), tuo metal efere n'ime a mgbanaka udi, na mechie ya.
3. Tinye ibe ntupu igwe anaghị agba nchara stampụ n'ime mgbanaka ahụ.
4.Punch na gbatuo mgbanaka ọzọ.