Each security image consists of a plurality of secure elements, each secure element being defined by two sets of parallel lines.
每个安全图像包括多个安全元素，每个安全元素由两组平行线定义。
Each secure element defines an alphanumeric character or other unique image that is visible only under certain conditions, i. e., when inspected through a viewer.
每个安全元素定义了仅在特定条件下，即当通过观察器检查时，才可见的一字母数字字符或其他独特图像。
Each secure element defines an alphanumeric character or other unique image that is visible only under certain conditions, i. e., when inspected through a viewer.
每个安全元素定义了仅在特定条件下，即当通过观察器检查时，才可见的一字母数字字符或其他独特图像。
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