The weapons are undergoing ballistics tests to see whether they were used in the shootings.这些武器正在接受弹道测试，以确定它们是否曾用于枪击案中。Ballistics was used in the criminal case to determine the gun's firing capacity.在该刑事案件中人们运用弹道学原理...
The laboratory has designed, tested and evaluated a lightweight, low - yield fission device.该试验室设计, 试验和鉴定了一种轻巧 、 低当量的裂变装置.Abstract: The friction energy dissipator is a damping device with simple structure and easy instal...