- 18
- Mar
90 minutes fire rated exterior door,louver fire rated steel door,swing type double leaf fire room door
Rezistenca ndaj zjarrit e dyerve të zjarrit prej çeliku është e ndryshme, dhe rezistenca e tyre ndaj zjarrit mund të ndahet në tre klasa: A, B dhe C.
https://ztfiredoor.com/23727.html
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