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Science | Entries: 169 | Views: 796 | Updated: 4 years ago | | Add to My Feeds
The office copy machines (photocopier) is everywhere. Seven millions unit are in used in the United States and more than 1.5 million are sold each year. Anyone who has worked in an office has probably used at least once or perhaps spend hours making many copies. The copy machines are not cheap, not just the [...]

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