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Evaluation of cobblestone sand making machine

Sep 19, 2020 Introduction. Cobblestone is a by-product of the exploitation of yellow sand because it is named after the goose egg. Cobblestone as a kind of natural stone is taken from the sand and stone hills which were uplifted by the ancient river bed after the crustal movement of tens of millions of years ago and is subjected to constant extrusion and friction during the process of torrential impact

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