请注意:此版本的所有临时修订版将在您购买时提供。防弹设备UL 7521范围1。1这些要求包括用于形成防弹屏障的材料、装置和固定装置，以防止抢劫、抢劫或狙击手等武装袭击。1.1于20061年12月21日修订。1.1本标准也可用于确定不符合设备定义的建筑构件的防弹性能，如窗户、墙壁或由防弹材料制成的屏障。1.1.1添加于20061年12月21日。2在这些要求中使用的术语“防弹”指的是提供保护，防止完全穿透、弹丸碎片通过或保护材料剥落（碎裂），从而对站在子弹正后方的人员造成伤害- 抵抗障碍。1.3这些要求还包括电动设备，例如使用电动交易托盘或包裹传递器的柜员固定装置，以及作为防弹产品组成部分的内部通信或其他电气设备。1.4本标准中使用的术语“产品”是指本标准涵盖的所有防弹设备或其任何部分，除非另有特别说明。

Please note: All interim revisions for this edition available at time of your purchase will be included.Bullet-Resisting EquipmentUL 7521 Scope1.1 These requirements cover materials, devices, and fixtures used to form bullet-resisting barriers which protect against robbery, holdup, or armed attack such as those by snipers.1.1 revised December 21, 20061.1.1 This standard can also be used to determine the bullet resistance of building components that do not fit the definition of equipment, such as windows, walls, or barriers made out of bullet resistant materials.1.1.1 added December 21, 20061.2 As used in these requirements, the term "bullet-resisting" signifies that protection is provided against complete penetration, passage of fragments of projectiles, or spalling (fragmentation) of the protective material to the degree that injury would be caused to a person standing directly behind the bullet-resisting barrier.1.3 These requirements also cover electrically-operated equipment, such as teller's fixtures using electrically-driven deal trays or package passers, and intercommunication or other electrical equipment that is an integral part of the bullet-resisting product.1.4 The term "product" as used in this standard refers to all bullet-resisting equipment or any part thereof covered by this standard unless specifically noted otherwise.