Dab tsi yog cov txiaj ntsim ntawm kev siv cov ntaub nplaum rau daim kab xev?
Cov kab xev nplaum nplaum nplaum yog cov ntaub ntawv zoo nkauj tshaj li tsev neeg, thiab tsim nyog rau cov kab xev siv tsev thiab sab hauv tsev, sab nrauv kom zoo nkauj, thiab muaj qhov sib luag. Npog kab xev muaj kev nplua zoo thiab tiv thaiv rau cov kab dej ntau hauv cov nplais ntsej muag, thiab nws yooj yim, ceev thiab zoo nkauj nyob hauv ntau qhov chaw siab lossis tsev kho kom zoo nkauj.
1. Cov kab xev nplaum muaj qhov sib npaug zoo thiab muaj zog loj.
2. Hloov qub, txaj ntug khov ntug.
3. Roj teeb phom dlej, nplaum zoo, zoo sib xws, nruab nrab viscosity thiab siab viscosity, thiab daim nplaum daim ntawv rau ntau theem kub.
