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Zettameter is an SI device for measuring distance. It is equal to 1021 meters. The symbol for zettameter is Zm.
The link (usually abbreviated as "l.", "li." or "lnk."), sometimes called a Gunter’s link, is a unit of length formerly used in many English-speaking countries. A link is exactly 66⁄100 of a foot, or exactly 7.92 inches or 20.1168 cm.