Kev nyab xeeb hloov pauv yog cov cuab yeej tseem ceeb rau kev nyab xeeb ntawm cov neeg ua haujlwm. Txhawm rau kom lawv ua haujlwm tau zoo, kev saib xyuas tsis tu ncua thiab kev saib xyuas yog tsim nyog.
1. Kev Tu: Tsis tu ncua ntxuav qhov chaw sab nraud ntawm qhov hloov kev nyab xeeb kom tswj tau qhov zoo.
2. Kev tshuaj xyuas: Tsis tu ncua xyuas qhov hloov pauv kom xoob, deformation, lossis lwm yam teeb meem. Hais txog tej teeb meem tam sim ntawd.
3. Hloov: Yog tias qhov hloov pauv kev nyab xeeb ua haujlwm tsis zoo, hloov tam sim ntawd. Tsis txhob sim siv nws nyob rau txhua qhov xwm txheej.
