1. Khaws thiab cia rau hauv qhov chaw txias, qhov chaw cua.
2, tsis txhob raug, tua hluav taws, ntxuav, khoom ntse thiab sib txuas nrog tshuaj lom neeg.
3, lub hnab tawv nqaij yog tsuas yog stitched thaum yuav tsum tau kua nplaum xwb, kua nplaum yog yooj yim rau yaj thaum nws nyob hauv kev sib cuag nrog dej, yog li sim tsis txhob tau dej thaum siv lub hnab nyiaj, thiab them nyiaj tshwj xeeb mloog hauv cov hnub los nag.
4, koj tuaj yeem siv Bi Lizhu lossis tib xim khau polish rau kev saib xyuas.
5, hauv kev tso cai, ib daim npav tsuas tso tau rau hauv ib daim npav xwb, tsis muaj peev xwm yuam tau ob daim yuaj, yuav ua rau lub hnab ntim qis.
6, yuav tsum ua tib zoo tiv thaiv txhua tus hlau fittings, ntub thiab cov khoom qab ntsev zoo yuav ua rau oxidation ntawm lub hnab, coated nrog ib txheej ntawm cov ntsia thawv ntsia hlau rau ntawm cov hlau npag tuaj yeem tiv thaiv cov hlau oxidation.
