The steel fire door can be opened with only 1kg force, and the opening tension is less than 50N, so even people in wheelchairs can open it easily. The steel fire door shall have good air tightness, be closed in place and tight, and will not leave the gap between the door and the air conditioner and heater overflowing.

fireproof door test,የእሳት መከላከያ በር ፣ የእሳት መከላከያ በር ከመስታወት ጋር ፣steel security door,ከእንጨት የተሠራ የእሳት ማገዶ በር ፣metal door frame drill,

የእሳት በር 1 ሰዓት, ​​20 ደቂቃ የእሳት ደረጃ ያለው በር,fireproof door test,የእሳት መከላከያ በር አምራች,metal door frame drill,የመውጫ በር ትርጓሜ ፣steel security door,

steel security door,የመውጫ በር ስፋት ምክንያት ፣ የአደጋ ጊዜ መውጫ በርን ይከፍታል ፣fireproof door test,የእሳት መውጫ በር ፣የእሳት ደረጃ ከሎቭር ጋር ፣metal door frame drill