| http://www.w3.org/ns/prov#value | - At least the top (front, when mounted) of the mail drop is preferably made of a transparent material, such as plastic, so that thepresence or absence of mail may be detected from afar.Features and AdvantagesAn object of this invention is to provide a mail drop box which traps mail securely within its interior whether the box is in a vertical or a horizontal position.
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