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1. The procedure for obtaining the family of ceramics, hemp, burnt earth or glass, and other similar materials and patterns, which are the same as the appearance of crayons (pencils) on charcoal or cakes, and shall not be changed.
1. The procedure for obtaining the family of ceramics, hemp, burnt earth or glass, and other similar materials and patterns, which are the same as the appearance of crayons (pencils) on charcoal or cakes, and shall not be changed.