Secret Service officers had automatic weapons drawn as they patrolled Lafayette Park, across from the White House.
特工人员手持自动武器在白宫对面的拉斐特公园警戒。
Residents of Basra said they could hear explosions and automatic weapons fire throughout the day, and columns of black smoke were seen rising above the city.
附近的居民们说，他们全天都可以听到爆炸声和机枪开火的声音，还看到滚滚黑烟在这个城市上空升起。
The convoy was attacked with mortar rounds and automatic weapons.
车队遭遇迫击炮和自动武器袭击。
Dynamic equations in matrix form are derived for automatic weapons.
导出了矩阵形式的自动武器动力学方程。
It is almost impossible to pass federal laws to restrict access to the most powerful semi-automatic weapons.
通过联邦法律来限制威力最强的的半自动武器的获取途径几乎是不可能的。
The method is of definite reference value for the strength analysis and movement of automatic machines of the automatic weapons.
该方法对于自动武器自动机的运动和强度分析具有一定的参考价值。
The topological optimization method was used to solve the lightweight design problems of components and parts in automatic weapons.
引入结构拓扑优化方法，解决自动武器零部件减重设计问题。
By use of FEA method, the results showed that topological optimization design of components in automatic weapons is an effective method to reduce the weight.
运用有限元法对自动武器零部件进行拓扑优化设计是一种自动武器减重设计的有效方法。
Study of generality of floating machine for a certain range of large caliber infantry automatic weapons is of great importance to the design of general-purpose mount.
研究浮动机对一定口径范围内大口径步兵自动武器的通用性，对于通用枪架的设计具有重要意义。
Thus the feasibility of introducing virtual prototyping technology into the design of automatic weapons is validated and the base is established for further simulation work.
这证实了将虚拟样机技术引入自动武器研制领域的可行性，并为进一步的仿真工作奠定了基础。
Thus the feasibility of introducing virtual prototyping technology into the design of automatic weapons is validated and the base is established for further simulation work.
这证实了将虚拟样机技术引入自动武器研制领域的可行性，并为进一步的仿真工作奠定了基础。
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