Ntau yam txheej txheem kho saum npoo tuaj yeem siv los hloov kho cov xim ntawm cov qhov rooj hluav taws steel. Piv txwv li, PVC txheej tshuab los yog electrostatic hmoov txau tshuab tuaj yeem siv los txheej txheej steel phaj nrog ib txheej ntawm ntoo grain los qhia qhov sov so ntawm cov qhov rooj ntoo.

steel pem hauv ntej qhov rooj,Fireproof qhov rooj nrog iav, Ntoo Fireproof qhov rooj, Fireproof qhov rooj rau lub tsev,fireproof qhov rooj foob sawb,hluav taws nyob qhov rooj lag luam,hluav taws qhov rooj bd,

hluav taws kub ntsuas qhov rooj nrog louvre, hluav taws kub resistant qhov rooj rau flats,fireproof qhov rooj foob sawb,hlau zawv zawg qhov rooj,hluav taws qhov rooj bd,hlau ruaj ntseg qhov rooj,steel pem hauv ntej qhov rooj,

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