Raws li qhov hais tias mus: "neeg vam khom khaub ncaws, nees ej". Kev hnav khaub ncaws haum haum tuaj yeem yog qhov zoo tshaj plaws ntawm tus neeg lub siab, qhov ua tau ntawm tus neeg lub siab, thiaj li qhia tau hais tias yog tus qauv zoo. Qhov tseeb, ntau qhov chaw yog tib yam, txawm tias nyob hauv thaj chaw ntawm lub ntim, zoo PE Khw Hnav tuaj yeem ua kom zoo dua qib ntawm cov khoom los txhawb cov khoom muag. Tam sim no yuav ua li cas los txheeb xyuas qhov zoo los sis phem PE Lub Hnab:
Thawj ntxhiab tsis muaj qhov hnyav tshwj xeeb hnyav, qhov kev xaiv ntawm cov hnab yas, lub siab, qhov zoo dua qhov qub. Tsis txhob siv cov zaub mov liab thiab xim dub. Nrog dej kub saib, saib ntawm tsis hnov tsw tsis hnyav heev.
Kev siv cov hnab yas ntim cov hnab yas, cov xim yuav tsum muaj xim dawb, txhais kom pom lossis tsis muaj xim thiab pob tshab, txhais tes tes muaj qhov yooj yim heev, muaj lubrication heev; tib lub sij hawm yuav tsum muab luam tawm ntawm cov lus qhia "khoom noj". Grey los yog lwm cov xim ntawm cov khoom noj khoom yas ua los ntawm cov khoom siv yas, muaj teeb meem rau cov neeg tsis muaj mob, tsis yog rau cov khoom noj khoom haus.
Yog tias koj xav yuav qhov zoo ntawm PE lub hnab ntim khoom xaiv tsa kuv lub tuam txhab, qhov khoom tau dav dav qhuas los ntawm cov neeg siv, thiab tuaj yeem ua raws li tus qauv ntawm cov neeg muas zaub los muab ntau yam tshwj xeeb ntawm PE lub hnab ntim.
