Personal Defense Projectincludes: underground protective buildings, combined with the ground building construction of the wartime can be used for air defense basement.
Personal defense project role: In the past, the main defense against sudden attacks by the enemy, sheltering personnel and materials, preserving the potential for war, and the modern human defense project has the benefit of the benefits, social benefits and economic benefits. Both take into account the wartime air defense needs, but also take into account the needs of economic construction, urban construction and people's lives in peacetime, with the dual function of peace and war.
Classification of human defense works:
1. According to the form of construction can be divided into tunnel works, trench works, stacked works and excavation works.
2. According to the function is divided into command and communication engineering, medical rescue engineering, air defense professional team engineering, personnel sheltering engineering and other supporting works.
3. According to the grade can be divided into 1, 2, 2B, 3, 4, 4B, 5, 6, 6B and other 9 levels.
Reference for the above: Baidu Encyclopedia-Personal Defense Project