Laser hologram tamper evident printing material.

激光全息防伪字模材料。

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While many historical material itself authenticity resembles, nobody can guarantee the micro data not tamper with the composition, 'GIGO effect "(input waste, an example is output waste)."

而很多历史资料本身真伪难辨，谁也不能保证那些微观资料中没有篡改成分，‘GIGO效应’(输入废物，输出废物)便是一例。

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