It points out that the direct spot welding of pure copper can be realized by the correct choice of pole material, pole form, welding equipment and criterion.

Used for outdoor advertising light box, through the door first, the announcement (publicity) column, pole light box display advertisements in the form of painting.

The first two pole wrote this soup aroma form of caramel, after the two gold so make than Yu Kuai, further emphasizes the soup is delicious.