水印信息可以是作者的序列号、公司标志等，可用来识别文件、图像或音乐制品的来源、版本、合法使用人对数字产品的拥有权等。
Watermark can be the author's serial number, company logo and so on, which could be used to identify the source and version of documents and images as well as the ownership from legal user.
水印信息可以是作者的序列号、公司标志等，可用来识别文件、图像或音乐制品的来源、版本、合法使用人对数字产品的拥有权等。
Watermark can be the author's serial number, company logo and so on, which could be used to identify the source and version of documents and images as well as the ownership from legal user.
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