The steel fire door has good air tightness and is closed very tightly without leaving a crack, allowing air conditioning and heating to overflow; When the steel fire door is opened, only 1KG force is required, and the opening tension is less than 50N.

fireproof door seal,brandsäkra dörrtillverkare i mumbai,metal fireproof door,meaning of fireproof door,

brandsäkra dörrtillverkare, brandsäkra dörrar för hem, brandsäker dörr,meaning of fireproof door,säkerhetsdörr i metall, brandsäkra dörrstandarder, brandsäker dörr,metal fireproof door,brandsäkra dörrlås,fireproof door seal,

brandsäker, dörrfärg,metal fireproof door,brandsäker dörr malaysia, metalldörr