Before the invention of the pugmill, craftsmen would wedge a large mass of clay with their feet into a circular mound.
在捣
（球磨）发明之前，手工艺人要（用脚“踩”成大
）
；搅土；叶片式洗矿Before the invention of the pugmill, craftsmen would wedge a large mass of clay with their feet into a circular mound.
在捣（球磨）发明之前，手工艺人要（用脚“踩”成大）
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