Cov ntawv hlau yog cov khoom siv dav siv hauv kev lag luam, thiab lawv lub luag haujlwm yog raws li hauv qab no:
1. Siv rau hauv kev tsim kho, kev tsim khoom, ntim thiab lwm yam kev lag luam: cov ntawv hlau tuaj yeem ua rau cov khoom siv hauv tsev, xws li cov kab hlau, steel kab, thiab lwm yam. Tib lub sijhawm, nws kuj yog ib qho tseem ceeb rau kev tsim tsheb, dav hlau, foob pob hluav taws, thiab lwm yam, thiab tseem tuaj yeem siv los ua cov khoom siv hauv tsev, cov khoom siv hauv chav ua noj, thiab lwm yam hauv kev ntim khoom, cov ntawv hlau tuaj yeem ua rau cov khoom ntim xws li cov kaus poom thiab cov fwj tshuaj pleev ib ce, uas yog siv dav hauv cov khoom noj, dej haus, tshuaj pleev ib ce. , tshuaj thiab lwm yam lag luam.
2. Siv rau kev ua thiab kev tsim khoom: cov ntawv hlau yog tsim nyog rau kev ua thiab kev tsim khoom. Sib txawv txiav, sib sau thiab stamping txheej txheem tuaj yeem ua raws li qhov xav tau kom tau txais cov khoom ntawm ntau yam duab, xws li lub cev tsheb, khoom siv, khoom siv hluav taws xob, thiab lwm yam.
3. Siv rau kev tiv thaiv thiab kho kom zoo nkauj: cov ntawv hlau tuaj yeem tsis tsuas yog muab kev txhawb zog thiab cov qauv, tab sis kuj muab kev tiv thaiv thiab kho kom zoo nkauj. Piv txwv li, cov ntawv hlau tuaj yeem siv los ua lub qhov rooj tiv thaiv tub sab, iav iav, thiab lwm yam, thiab tseem tuaj yeem siv los ua rooj tog, teeb pom kev zoo thiab lwm yam khoom dai.
4. Siv rau cov khoom siv pov tseg: cov ntawv hlau tuaj yeem siv tau thiab rov siv dua, xws li rov ua dua rau hauv cov hlau, kev tsheb ciav hlau, thiab lwm yam, kom txuag tau cov peev txheej thiab tiv thaiv ib puag ncig.
