File:International prototype of the kilogram aka Le Grand K.jpg
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![File:International prototype of the kilogram aka Le Grand K.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/International_prototype_of_the_kilogram_aka_Le_Grand_K.jpg/482px-International_prototype_of_the_kilogram_aka_Le_Grand_K.jpg?20220505144952)
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