automatic principle造句

Different kinds of guns have different gun structures and automatic principles
不同种类的枪支结构及自动原理有所不同。
Criminal gunshot verifiers should study the funs ' automatic principles and guns ' structures , explore the foundation and changes of bullet marks , which can lay strong foundation for making a good job in criminal gunshot verification
刑事验枪人员应对枪支的自动原理及枪支结构进行研究，并在此基础上进一步研究枪弹痕迹的形成及变化，为搞好刑事验枪工作打下坚实的基础。
It's difficult to find automatic principle in a sentence. 用automatic principle造句挺难的