Image: USPS mail flow through national infrastructure
Size of this PNG preview of this SVG file: 676 × 592 pixels. Other resolution: 274 × 240 pixels.
Original image (SVG file, nominally 676 × 592 pixels, file size: 493 KB)
Description: Mail Flow through National Infrastructure. Note: Originating mail refers to where the mail enters the system, while destinating mail refers to where the mail leaves the system. This figure depicts mail that originates and destinates in different locations.
Usage Terms: Public domain
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