Kev piav qhia
-Rau tsim nyog muab faib, zoo huv si thiab muaj kev sib haum xeeb, ntsib kev cia khoom txhua hnub yuav tsum ua kom koj lub tsev me me qhov chaw loj suav nrog cov txee cia thiab ib nrab qhib cia
- Ntau lub thawv ntim khau, uas tuaj yeem muab tshem tawm thiab sib sau ua ke raws li koj tus kheej xav tau
-Muaj ntau qhov chaw cia siv qhov chaw, kho cov txee, yooj yim thiab tswj tau
-Wide thiab semi-qhib cov txee, koj tuaj yeem tso lub neej cov khoom tsis tseem ceeb raws li koj nyiam
-Cov khoom muaj zog thiab cov qauv ruaj khov, muaj zog bearing muaj peev xwm
-Tag nrho pem teb-sawv txee taw, muaj zog load-bearing thiab ruaj
-Txoj ntoo kov, ruaj khov thiab dav, sov rau qhov kov, tiv thaiv khawb thiab raug mob thaum siv
Cov khau khiab feem ntau xa mus rau cov khib nyiab khib nyiab uas tib neeg siv los tso thiab khaws cov khau tsis siv rau kev tswj tau yooj yim thiab nkag mus rau khau. Muaj ntau ntau hom, thiab kev tso kawm thiab kev khaws cia kuj hloov tau yooj yim dua.