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US4813062A Radio-opaque marker and method 失效
无线电不透标记和方法

Radio-opaque marker and method
摘要:
A crayon-like marker is described which is capable of making marks detectable by X-ray on various substrates, e.g., textile products. The marker is comprised of a waxy medium in which is dispersed a radio-opaque substance. Additional coloring agents may be added if desired.
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