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Sprue
In casting, the entrance hole and main channel in the wall of a mould through which the liquid material (bronze or other metal) is poured; it is joined to the model by smaller channels called gates. The waste material formed by the channel is also called sprue and is cut away after the investment material is removed, as the first step of cleaning up a cast metal sculpture.
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- Part of Speech: noun
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- Industry/Domain: Arts & crafts
- Category: Sculpture
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