辨认:看门框上的圆形钢印根据现行防盗门的国标规定,防盗门门框靠近合页位置约1.6米处印有一个圆形的、标注“甲”“乙”“丙”“丁”代表防盗等级的钢印,如果没有此钢印,就不是防盗门。根据防盗门的防盗等级,门框与门扇间的锁点数量也有相应规定,甲级门不少于12个,乙级门不少于10个,丙级门不少于8个,丁级门不少于6个。锁点越多,破坏难度越大,破坏时间越长。国标规定,各级防盗门的防破坏开启时间为:甲级不得低于30分钟,乙级不低于15分钟,丙级不低于10分钟,丁级不低于6分钟。 Identify: circular stamp on the door frame According to the current national security standard anti-theft door, the security door frame near the hinge position about 1.6 meters printed with a round, marked “A” “B ” “C ”“ Ding ”Seal on behalf of the anti-theft level, if there is no such seal, it is not security door. According to the anti-theft door anti-theft rating, the number of locking points between the door frame and the door also have the corresponding provisions, not less than 12 Class A door, Class B door no less than 10, Class C door no less than 8, Less than 6. Lock the more damage the greater the destruction of the longer. GB requirements, anti-theft doors at all levels of anti-vandalism open time: Class A shall not be less than 30 minutes, B not less than 15 minutes, C not less than 10 minutes, Ding not less than 6 minutes.