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aviation security
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aviation security
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aviation security
航空安保
为了保护民用航空活动免受非法干扰行为的威胁,对人力和物力资源,以及相关措施进行综合使用的社会活动。
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free variable
free-variable
free vector
free verse
free vertex
free vibration
free-volume model
free volume model of diffusion
free volume theory
free vortex
free vortex layer
free walk
free water
free water knockout
freeway
freeway ETC system
Freeway in Federal Republic of Germany
freeway surveillance and control
freeway surveillance and control system
Free Weekly
free will theory
Free-Wilson addition model
freeze concentration equipment
freeze damage
freeze-dried blood component products
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