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A system of wax tubes (sprues) is then attached to the wax pattern to create channels through which the bronze will eventually flow.
Sprues are attached by heating the ends with a hot tool and affixing to the wax pattern at regular intervals.
The sprues rise up to a single point above the wax pattern, to which a funnel shaped wax cup is attached.
It is through this point that the bronze will be poured.
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