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security thread /sɪkjˈʊəɹɪti ˈθɹɛd/ n

中文：防伪安全线

中文 · 防伪安全线Español · hilo de seguridadFrançais · fil de sécurité
Meaning：A feature to prevent counterfeiting; a dark line that is visible in transmitted light is inserted into the paper.
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Banknote front

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