| 摘要 |
PROBLEM TO BE SOLVED: To manufacture an abrasive excellent in polishing effect and inexpensive. SOLUTION: This abrasive is made by solidifying a soft part 13 of a shell 11 by taking out the shell 11 from a raw cuttlefish of a sepiibae family and drying it in the sun for about 2 to 7 days. It is possible to powder the solidified abrasive. COPYRIGHT: (C)2004,JPO
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