Before the invention of the pugmill, craftsmen would wedge a large mass of clay with their feet into a circular mound.
在捣泥机（球磨机）发明之前，手工艺人要（用脚“踩”成大泥
）
Before the invention of the pugmill, craftsmen would wedge a large mass of clay with their feet into a circular mound.
在捣泥机（球磨机）发明之前，手工艺人要（用脚“踩”成大泥）
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