Feem ntau ntawm cov qhov rooj hluav taws steel yog kho los ntawm kev txau nto. Cov khoom hnav-resistant xws li pulleys hauv lub qhov rooj hluav taws kub yog txhua yam khoom siv zoo, uas yog cov khoom zoo thiab ua haujlwm ntev.

https://ztfiredoor.com/24683.html

steel hluav taws shutter,ob teev hluav taws qhov rooj,cov khoom siv hluav taws xob qhov rooj,eclisse zawv zawg qhov rooj hluav taws,hluav taws kub ntsuas qhov rooj tub ntxhais, 60 feeb hluav taws ntsuas,steel hluav taws shutter,hluav taws kub nkag qhov rooj rau ceilings,eclisse zawv zawg qhov rooj hluav taws,fireproof qhov rooj rau chav boiler,steel hluav taws shutter,fireproof access hatch,ob teev hluav taws qhov rooj,hluav taws qhov rooj 60,eclisse zawv zawg qhov rooj hluav taws,45 feeb hluav taws qhov rooj,ob teev hluav taws qhov rooj,hluav taws kub ntsuas qhov rooj casing