Copper
Black iron
Aluminium
Galvanised iron
Rest of work
Supporting piece
Sharpening
Folding shapes
Welding rod
Synthetic element
Pure metal or alloy
Non metallic element
Ammonium chloride
Zinc chloride
Resin
Paste
Releasing of seam
Compress the seam
Closing and locking of seam
Stress relieving during seam operation