The fuze safety system is not just an absolute sub-system in fuze, and is not equivalent to safetyandarmingdevice.
引信安全性设计是引信的核心技术之一，引信安全系统是引信安全性设计的主要体现形式。
2
The frame of electro-mechanical safetyandarmingdevice (S&A) is established, and the electro-mechanical S&A for the mortar shell fuze is designed at the end of the paper.