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,ຜູ້ຜະລິດປະຕູທົນທານຕໍ່ໄຟໃນ Mumbai,metal fireproof door,meaning of fireproof door,

ຜູ້ຜະລິດປະຕູທົນທານຕໍ່ໄຟ, ປະຕູທົນທານຕໍ່ໄຟສໍາລັບເຮືອນ, ປະຕູທົນທານຕໍ່ໄຟ,meaning of fireproof door,ປະຕູຮົ້ວໂລຫະ, ມາດຕະຖານປະຕູທົນທານຕໍ່ໄຟ, ປະຕູທົນທານຕໍ່ໄຟ,metal fireproof door,locks ປະຕູທົນທານຕໍ່ໄຟ,fireproof door seal,

ທົນທານຕໍ່ໄຟ, ສີປະຕູ,metal fireproof door,ປະຕູທົນທານຕໍ່ໄຟມາເລເຊຍ, ປະຕູໂລຫະ