Technological advance preparation bellows fire, I Copper Tatu small steamer, wooden Zengpiyan small (diameter of about 10 centimeters, about 8 cm) a few months.
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- 工艺预先准备风箱火、大肚小口铜蒸锅,木制小甑(直径约10厘米、高约8厘米)数个。