Ntev npaum li cas tuaj yeem ua tau cov kas fes taum hlau pail khaws cov qab ntawm taum qab
Puas yog kas fes taum hlau hlau thoob
Dab tsi yog cov hau kev sib khi rau kas fes taum hlau hlau
Lub kas fes taum hlau ua rau cov tsw ntawm taum kas fes?
Yuav ua li cas kom kas fes taum tshiab tshiab hauv kas fes taum hlau hlau pails
Dab tsi noo noo-pov thawj kev ntsuas ua kas fes taum hlau hlau yuav tsum tau?
Dab tsi yog qhov ua haujlwm ntawm cov txheej sab hauv ntawm kas fes taum hlau hlau thoob?
Dab tsi cua permeability ntawm kas fes taum hlau hlau pail muaj rau ntawm cov taum kas fes?
Yuav ua li cas kas fes taum hlau hlau hluav taws xob hloov mus rau kas fes taum ntawm sib txawv ci ci
Dab tsi yog qhov yuav tsum tau ua rau daim ntawv thov ntawm cov hlau nplaum tinplate hlau hauv kev lag luam khoom noj?
Dab tsi yog qhov yuav tsum tau ua rau kev kov tus qauv ntawm cov thoob hlau tinplate?
Ntau npaum li cas lub siab kuj yuav ib tug tinplate hlau pail muaj?
