| 摘要 |
The upper (10) and lower half (12) of the mold are placed on top of each other leaving a space (20) in the center and having two spacers (64, 66) positioned between them. The mold is filled with a durable substance through a specific duct (16) and after hardening the spacers can be removed to both sides. The copies are separated with a knife, the molds taken apart and the new template removed. The two parts of the mold are joined and filled a second time in order to produce the final copy.
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