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Exagram or exagramme is equal to 1018 gram (unit of mass), comes from a combination of the metric prefix exa (E) with the gram (g). Plural name is exagrams.
Long ton, also known as the imperial ton or displacement ton is the name for the unit called the "ton" in the avoirdupois or Imperial system of measurements standardised in the thirteenth century that is used in the United Kingdom and several other British Commonwealth of Nations countries alongside the mass-based metric tonne defined in 1799.