What is the good method of parallel lines?

It's easy to connect multiple wires in parallel. Because multi-strand copper-core flexible wires are easy to be articulated and combined; ? If it is a single hard copper wire, it is more difficult to tighten it by hand.

At present, there is a patented electric twisting machine, which tightens the thread in half a second and is a lucky star for doubling the number of strands.

There is no need to worry about not screwing tightly and hurting hands, and the quality and efficiency are improved. Engineers can understand the following picture at a glance.