katundu 30 zidutswa 3D zitsulo kuwotcherera tebulo

Matebulo 30 apamwamba kwambiri a nitriding welding amalizidwa, ndipo tili okonzeka kumaliza kunyamula katundu wamba wamba kuti tiwonetsetse kuti zinthuzo sizidzagwedezeka panthawi yamayendedwe.