Kev siv: qhov cub yog cov khoom siv hluav taws xob kaw siv los ci zaub mov lossis khoom qhuav; Qhov cub yog ib yam khoom siv uas tuaj yeem ua rau saum npoo ntawm cov ntaub ntawv qhuav thiab dehumidified sai dua. Hauv cov txheej txheem ntawm kev siv, nws tuaj yeem cuam tshuam nrog ntau yam thiab ci zaub mov tib lub sijhawm.
Qhov tshwm sim: raws li qhov pom, qhov cub tuaj yeem muab faib ua qhov cub kab rov tav thiab ntsug qhov cub; Cov qhov cub hauv tsev tau muab faib ua cov qhov cub me me thiab cov qhov cub hauv qhov cub.
