This card's artwork depicts two separate pieces of metal being melded together via the process of welding, reflecting this card's effect of Fusion Summoning a MachineFusion Monster.
The welding appears to be done using an oxy-acetylene torch, which is unusual as it is used to cut metal instead of welding it, though it is still used for welding thicker metal together. This possibly explains the reason why this card doubles the ATK of monsters Summoned by this card's effect.