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足迹化学提取法
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足迹化学提取法
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chemical extraction
足迹化学提取法
利用足迹中的物质成分与相关化学试剂中某些成分相互作用原理,产生化学反应生成有颜色的化合物或荧光物质,使得痕迹显色,增强与承痕客体表面的颜色反差,从而显现足迹的痕迹形态,再利用照相法对足迹等痕迹进行拍照固定的提取方法。
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railway time synchronization network
railway track
railway track maintenance and renewal
railway traction network
railway traffic accident
railway traffic capacity
railway traffic control
railway traffic hygiene quarantine
railway traffic volume
railway train traction calculation
railway transmission network
railway transportation
railway transportation asset and resource
railway transportation cost
railway transportation development
railway transportation plan
railway transportation revenue
railway transportation statistics
railway transport capacity
railway transport enterprise
railway transporter for fairing
railway transport freight tariff
railway transport industry
railway transport tariff
railway transport vehicle for missile
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