Photograph 4: Macroscopic views of the melted and fused copper connection lugs with conductors (left and right). Inset (red box and arrow) shows a microscopic view of the melted lump of copper.

Photograph 4: Macroscopic views of the melted and fused copper connection lugs with conductors (left and right). Inset (red box and arrow) shows a microscopic view of the melted lump of copper.

Photograph 4: Macroscopic views of the melted and fused copper connection lugs with conductors (left and right). Inset (red box and arrow) shows a microscopic view of the melted lump of copper.