Siv dav hauv kev tsim kho vaj tsev, kho vajtse, kos duab kho kom zoo nkauj kev lag luam.
Qhov zoo:
1. Txheem lo lus qhov.Screw - groove qhov tob thiab specification yog tus qauv.Qhov saum npoo yog puag ncig thiab tsis yooj yim rau plam.
2. Electroplating kev kho mob, linoleum ntsia thawv seem yog du thiab du, tsis muaj residual burr, zoo huv si thiab meej xov.
3. Ntsia taub hau, du lub taub hau, tsis sib xws quab yuam, fastening nyhuv yog zoo dua.