Kev txheeb xyuas txoj kev zoo ntawm kev hloov hluav taws xob hloov hluav taws xob hloov pauv - Feem ntau, qhov tso cai ntawm qhov ntsuas kub ntawm cov hluav taws xob qis hluav taws xob yog 40 ° C ~ 50 ° C. Yog tias qhov zoo ntawm cov khoom siv insulating siv yog qhov zoo, qhov tso cai kom sov tuaj yeem ua tau. nce.
