1. Copper wire with a cross-sectional diameter of more than 1.3mm, without tin plating, enamel, surface degradation, etc.

2. The stripping of copper wire by removing the covering layer (skin) from miscellaneous wires is called light (light copper/special grade copper wire).

3. Except for the stripped wire, all are parallel copper or embedded copper.

4. If there are attachments such as oil, paper, film, paint, etc., it cannot form light.

5. Flat angle wires are parallel copper.

6. When uniting, we must use "light" to unite. Treat as "black copper" when united outside of light. (Adhesive tape, belt, iron wire, copper wire below 1.3mm, etc. are also discounted objects)

7. The thing that peeled off the DV cable may have the possibility of adding different components to be purchased with copper.