Lub qhov rooj tua hluav taws yog airtight heev, thiab nws tsis tuaj yeem tawm qhov sib txawv ua kom lub tshuab cua txias thiab lub tshuab hluav taws xob ntws tawm mus ntev li ntev tau thaum nws raug kaw. Tom qab lub qhov rooj hluav taws raug ntsia thiab kaw, qhov sib txawv yuav tsum tsis txhob loj dhau, txwv tsis pub qhov kev sib khi ntawm lub qhov rooj hluav taws tsis tuaj yeem lav tau, thiab nws txoj haujlwm ntawm kev txwv qhov hluav taws kub thiab cov pa taws tsis tuaj yeem cuam tshuam los ntawm hluav taws kub.

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