3. Lub taub hau ntsia hlau ntog: Tom qab riveting, lub taub hau mandrel tsis tuaj yeem qhwv thiab ntog tawm ntawm lub cev rivet.
4. Riveting lub cev tawg: Tom qab rub riveting, lub cev riveting muaj ib tug longitudinal tawg los yog tawg tag.
https://www.yukerivet.com/news/the-nail-cap-came-off-what-is-the-reason/
Post lub sij hawm: Lub Xya hli ntuj-28-2022