这是一个禁止外国人入内的地区。
It can be permanently mounted, fits in with highly-building, on the roof, forbidden area of dangerous, equipment of machine and so on.螺钉固定,适用于高架物体、大楼顶端、危险禁地、机器设备等定点警示。
The fire-forbidden areas of the archibald are classified comprehensively. The forming reasons and characteristics of each kind of fire-forbidden area are analyzed.根据禁止射击的原因,将高炮的禁止射击区分为死区、安全区和无诸元区,并讨论了每一类禁止射击区的特点。