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SUBJECT MATTER WITH HOLOGRAPHICAL AND BACKGROUND RAILWAY REMARKS
SUBJECT MATTER WITH HOLOGRAPHICAL AND BACKGROUND RAILWAY REMARKS
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机译:具有全息和背景铁路标记的主题
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摘要
An article is disclosed having both holographic and retroreflective features. The article includes a holographic layer that is perceptible under normal lighting conditions and substantially imperceptible to the unaided eye under retroreflective lighting conditions, a retroreflective layer perceptible under retroreflective lighting conditions, and means for bonding the two layers together. IMAGE
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