Kev siv daim ntawv thov: lub tshuab no haum rau cov tshuaj, tshuaj txhua hnub, zaub mov, tshuaj tua kab thiab kev lag luam tshwj xeeb thiab lwm yam khoom lag luam, xws li khoom noj khoom haus ntxiv, desiccant, mis hmoov, hmoov, kua mis hmoov thiab txhua hom hmoov.
Cov ntawv sau tshwj xeeb: txhawm rau tiv thaiv cov plua plav hauv cov txheej txheem ntawm kev sib khi nrog cov khoom sib khi, nws raug nquahu kom siv thawj cov khoom ntim, tom qab ntawd thauj cov ntim ntim, thiaj li zam dhau qhov tshwm sim ntawm ntim ntim khoom.
(Cov txheej txheem khoom siv: tag nrho cov txheej txheem ntawm kev pib thiab teeb tsa kub rau qhov kub thiab txias tsis tu ncua → kev teeb tsa cov txheej txheem → kev tuav cov zaub mov pub mis sil pub mis ntsia hlau metering tshuab → ntsia hlau metering → lub hnab ntim khoom → luam ntawv hnub tsim tawm → filling hmoov → sealing → txiav tawm → ntim cov khoom tiav tiav;)
