1. Tooj dag hlau feem ntau yog siv los ua feem rau ntau yam khoom siv hluav taws xob thiab cov khoom siv hluav taws xob thiab cov khoom siv, nrog rau cov khoom lag luam xws li nkoj thiab cov raj xa khoom. Vim nws zoo heev corrosion tsis kam thiab ua kev ua tau zoo, tooj dag hlau tau siv dav hauv ntau thaj teb.
2. Liab tooj liab hlau feem ntau yog siv los ua ntau qhov kev coj ua, xws li cov xov hlau thiab cable. Vim nws cov hluav taws xob zoo, liab tooj liab hlau tau dav siv hauv lub zog kis thiab lwm thaj teb.
Muaj ntau qhov sib txawv ntawm tooj dag hlau thiab liab tooj liab hlau ua cov khoom siv lub cev, tshuaj lom neeg thiab daim ntawv thov. Brass xaim muaj zoo corrosion tsis kam thiab ua kev ua tau zoo, thiab haum rau kev ua ntau yam khoom muaj kev lag luam thiab qhov chaw. Cov hlau liab liab muaj hluav taws xob zoo thiab haum rau kev ua ntau yam kev ua tau zoo. Thaum xaiv siv nws, kev xaiv yuav tsum tau ua raws li cov kev xav tau thiab lub hom phiaj.