Siv tau los tswj cov neeg khiav dej num, txhua qhov rooj nkag thaum muaj xwm txheej ceev, kev nyab xeeb tawm qhov rooj, qhov rooj hluav taws, qhov rooj khiav, qhov rooj tawm hluav taws.

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fireproof ob qhov rooj,24 x 80 hluav taws ntsuas qhov rooj,hluav taws kub ntsuas chav tsev nkag qhov rooj,45 feeb hluav taws nyob phab ntsa,2 × 2 hluav taws nyob rau hauv vaj huam sib luag,fireproof ob qhov rooj,6 vaj huam sib luag du hluav taws qhov rooj, 2hr hluav taws nyob qhov rooj nqe,45 feeb hluav taws nyob phab ntsa,hluav taws kub ntsuas accordion qhov rooj,fireproof ob qhov rooj,hluav taws kub hauv qab daus qhov rooj,24 x 80 hluav taws ntsuas qhov rooj,ib nplooj ntoos hluav taws qhov rooj,45 feeb hluav taws nyob phab ntsa,hluav taws kub nyob attic nkag vaj huam sib luag,24 x 80 hluav taws ntsuas qhov rooj,hluav taws kub ntsuas qhov rooj 36 × 80