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Crucible
A crucible is a container that can withstand very high temperatures and is used for metal, glass, and pigment production as well as a number of modern laboratory processes. While crucibles historically were usually made from clay,〔Percy, John. ''Natural Refractory Materials Employed in the Construction of Crucibles, Retorts, Forunaces &c.'' Metallurgy. London: W. Clowes and Sons, 1861. 208–09. Print.〕 they can be made from any material that withstands temperatures high enough to melt or otherwise alter its contents.
==History==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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