... 精炼；改进；改善 refinement 程序精进 refinement of procedure 标度精制 refinement of scale ...
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Professional Zisha Craftsman will tell you how to distinguish the Yixing purple clay from other ceramic materials and show you the procedure of the clay refinement in Ming and Qing Dynasty.
邀请紫砂文化专家和工艺师讲解陶土和紫砂矿料的识别、明清紫砂泥的制作过程。
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