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日本一家公司研制出一种可复盖在纸上的薄膜,纸上有了这层薄膜,就不能通过复印机进行复印,避免了重要文件被复印泄密。
A Japanese company has developed a film that can be covered on paper. With this film on the paper, it cannot be copied by a copying machine, preventing important documents from being copied.