通过对火箭包的结构进行分析，确定薄弱环节，对整体防松和点火管密封性进行了必要的结构改进。
According to analyze the structure of survival rocket and identify its vulnerable spots, necessary structural improvements are put on overall lock and the hermeticity of igniter tube.
通过对火箭包的结构进行分析，确定薄弱环节，对整体防松和点火管密封性进行了必要的结构改进。
According to analyze the structure of survival rocket and identify its vulnerable spots, necessary structural improvements are put on overall lock and the hermeticity of igniter tube.
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