Kev pabcuam

Ntxiv nrog rau peb cov khoom uas twb muaj lawm, peb tuaj yeem ua raws li cov neeg siv khoom kos duab lossis cov qauv ntawm kev tsim khoom ntawm ntau yam khoom. Thaum ntxov peb yuav sib txuas lus nrog koj kom meej, cov khoom tom qab kev pom zoo peb yuav ua ntej ntau lawm rau cov neeg siv khoom ib tug qauv ntawm cov khoom, thaum tus neeg muas zaub tom qab peb paub meej tias cov khoom, nyob rau hauv tus txheej txheem ntawm ntau lawm, peb nruj me ntsis tswj cov khoom zoo, yog tias muaj teeb meem zoo, peb yuav ua kom them nyiaj, los ntawm daim ntawv qhia kev cai rau txhua yam roj lubricating. Peb muab cov khoom zoo thiab efficiency yog ib tug puv tes