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civil air defense shelter
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civil air defense shelter
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civil air defense shelter
人防工程
为防范或减轻战争空袭危害,保护国家和人民生命财产安全,按预定防护要求修建的防护工程。全称人民防空工程。美国、英国、法国、瑞士、瑞典、芬兰等国家称民防工程。
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