Lub qhov rooj fireproof sealing sawb yog ntsia rau hauv qab ntawm lub qhov rooj fireproof. Thaum lub qhov rooj kaw, nws yuav cia li txuas lub txav txav mus rau hauv qab kom nias hauv av thiab kaw qhov sib txawv ntawm lub qhov rooj hauv qab thiab hauv av. Qhov hluav taws kub qhov rooj sealing sawb tiv thaiv cov pa phem los ntawm kev nkag mus rau hauv chav los ntawm qhov sib txawv ntawm lub qhov rooj hauv qab ntawm qhov pib ntawm hluav taws.

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